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Chalk lines

IRWIN Chalk reel, 100 ft, aluminum, 1:1

The only reel here that says how many lines you get from one pull — five or six — and the only one whose spool aerates the chalk.

IRWIN Strait-Line Classic aluminum chalk reel with steel handle

IRWIN Chalk reel, 100 ft, aluminum, 1:1

The only reel here that says how many lines you get from one pull — five or six — and the only one whose spool aerates the chalk.

Functions
FIVE TO SIX STRIKES PER PULL, from 100 ft of abrasion-resistant poly line — stated, and it is the only strike count published on this shelf. That figure matters more than a gear ratio for a lot of work: pulling the line once and snapping five parallel lines off it is five snaps with one rewind
Body and fittings
A 1:1 gear ratio, stated as simple line retraction. One to one is the SLOWEST on this shelf — the others publish 6:1, 4:1, 3:1 and 2:1 — and it is paired here with a robust steel handle and a large center hub stated for durability, strength and torque. Direct drive with a steel crank is the choice that survives a bound line
Material
An Aluminum housing stated for impact resistance. It is one of only two metal shells on this shelf; the rest are ABS or unstated, and a metal case dents where plastic cracks and empties itself
Also stated
An innovative spool design stated to help preserve the line AND AERATE THE CHALK. Aeration is published by nobody else here and it is a real mechanism: chalk packs down round a wound line and stops loading it, and a spool that lets air through keeps the powder loose
Measuring mode
The center line can be used as a plumb bob, stated. It is one of two reels on this shelf that doubles that way — the reel hangs from its own line and marks a vertical from a ceiling point
Supplied
Blue chalk included, stated, in a kit with the reel. Blue is the removable color: it brushes out of plaster and timber where red does not, which makes this a finishing reel as supplied
Reference and mounting
A nested hook dock stated to reduce hook snags, and a wide fill door stated to improve visibility when refilling. A slim profile is stated to enhance grip for low-strain use
Amazon reference
B0BWL62GNJ
EAN
0885911883146
  • Five to six strikes per pull, the only strike count here
  • An aluminum housing, one of two metal shells on this shelf
  • 1:1, the slowest gearing on this shelf

Best for: Repeated snaps along one run, where the reel is pulled out once and used five times

≈ $10
Check price on Amazon

Specifications

Functions
FIVE TO SIX STRIKES PER PULL, from 100 ft of abrasion-resistant poly line — stated, and it is the only strike count published on this shelf. That figure matters more than a gear ratio for a lot of work: pulling the line once and snapping five parallel lines off it is five snaps with one rewind
Body and fittings
A 1:1 gear ratio, stated as simple line retraction. One to one is the SLOWEST on this shelf — the others publish 6:1, 4:1, 3:1 and 2:1 — and it is paired here with a robust steel handle and a large center hub stated for durability, strength and torque. Direct drive with a steel crank is the choice that survives a bound line
Material
An Aluminum housing stated for impact resistance. It is one of only two metal shells on this shelf; the rest are ABS or unstated, and a metal case dents where plastic cracks and empties itself
Also stated
An innovative spool design stated to help preserve the line AND AERATE THE CHALK. Aeration is published by nobody else here and it is a real mechanism: chalk packs down round a wound line and stops loading it, and a spool that lets air through keeps the powder loose
Measuring mode
The center line can be used as a plumb bob, stated. It is one of two reels on this shelf that doubles that way — the reel hangs from its own line and marks a vertical from a ceiling point
Supplied
Blue chalk included, stated, in a kit with the reel. Blue is the removable color: it brushes out of plaster and timber where red does not, which makes this a finishing reel as supplied
Reference and mounting
A nested hook dock stated to reduce hook snags, and a wide fill door stated to improve visibility when refilling. A slim profile is stated to enhance grip for low-strain use
Amazon reference
B0BWL62GNJ
EAN
0885911883146

What the maker puts in writing

  • 100 ft abrasion-resistant poly line, provides 5 to 6 strikes per pull
  • Simple line retraction because of 1:1 gear ratio
  • Aluminum housing provides impact resistance
  • “Innovative spool design helps preserve line and aerate chalk”
  • Robust steel handle and large center hub add durability · enhanced strength and torque
  • Nested hook dock helps reduce hook snags · wide door for increased visibility when refilling
  • Slim profile enhances grip for low-strain use · center line can be used as a plumb bob · blue chalk included

No line diameter. No sealing organ. No chalk capacity.

Five strikes from one pull

The only strike count on this shelf.

It decides how often you rewind. The gear ratio decides how long each rewind takes. Those are different questions, and only one of them is usually answered.

Marking a row of parallel lines along a floor or a sheet of plasterboard: five snaps from one pull with a slow rewind beats one snap from one pull with a fast one.

IRWIN is the only maker here to publish it — and it depends on the chalk as much as the line.

One to one, on purpose

The slowest ratio on this shelf, below the 2:1.

Gearing up multiplies turns and divides force at the handle. A 6:1 reel strips when the line binds.

Direct drive with a steel crank and a large center hub pulls a chalk-laden hundred-foot line back with no gearbox to break.

The cost is plain: a hundred feet at 1:1 is roughly a hundred and twenty turns. The 6:1 reel here does it in twenty.

Five strikes per pull is IRWIN’s answer — rewind less often rather than faster.

A spool that lets air through

Which is the quiet failure nobody else addresses.

Powder packs down around a tightly wound line. A packed reel loads the string badly however full it is.

That is the faint snap that gets repeated twice, and the suspicion that the reel is empty when it is not.

Shaking it is the normal workaround. IRWIN states a spool designed to aerate the chalk instead.

And aluminum

One of two metal shells on this shelf.

Plastic cracks off a scaffold board and empties itself. Metal dents.

With a steel handle and blue chalk in the box, ten dollars buys a finishing reel that will outlast its line.

Availability

On sale at around 10 € on the American Amazon store at the time of checking.

Prices and availability are what Keepa reported on the date this page was updated; both move.

Prices quoted in this text were read on 8 October 2026. The live price is at the top of the page.

What gets asked here

What does "five to six strikes per pull" mean?

That one pull of the line lays five or six usable snaps before the chalk on it runs out. It is the figure that decides how often you rewind — and it is a different question from the gear ratio, which decides how long each rewind takes. For marking a row of parallel lines along a floor or a sheet of plasterboard, five snaps from one pull with a slow rewind beats one snap from one pull with a fast one. IRWIN is the only maker on this shelf to publish a strike count at all, and it depends on the chalk as much as the line.

Why would a maker choose 1:1?

Torque and simplicity, and the rest of the listing supports it. A geared reel multiplies turns and divides the force at the handle, which is why a 6:1 strips when the line binds; a direct-drive reel with a steel handle and a large center hub pulls a chalk-laden hundred-foot line back without a gearbox to break. The cost is plain: a hundred feet at 1:1 is roughly a hundred and twenty turns, where the 6:1 reel on this shelf does it in twenty. Five strikes per pull is IRWIN's answer to that — rewind less often rather than faster.

Does aerating the chalk matter?

It is the quiet failure of a chalk reel. Powder packs down around a tightly wound line, and a packed reel loads the string badly however full it is — which produces the faint snap that gets repeated twice and the suspicion that the reel is empty when it is not. IRWIN states a spool designed to preserve the line and aerate the chalk, and nobody else on this shelf mentions it. Shaking a reel before use is the normal workaround; a spool that lets air through makes it unnecessary.

More chalk lines

  • Gakago chalk line reel with its aluminum body and red chalk refill

    Gakago Chalk line set, 30 m (98 ft), with permanent chalk

    A chalk line sold with permanent chalk rather than temporary — a choice that decides where the tool can be used, and where it must not be.

    Amazon reference
    B0G3S13RRX (identical on 6 markets)
    EAN
    4260767450388
    Stated dimension or range
    30 m (98 ft) line
    Stated weight
    150 g (5.3 oz) permanent red chalk
    Material
    aluminum body
    • Supplied with 150 g (5.3 oz) of permanent chalk, stated as giving durable water-resistant lines
    • Thirty meters of marking line in an aluminum body
    • Permanent chalk on the wrong surface cannot be removed

    Best for: Roof, slab and external work where the line has to survive the weather.

    Check price on Amazon
  • Kendo chalk line reel with its stainless hook and integrated bubble vial

    Kendo Chalk line set, 30 m (98 ft), three pieces

    A 30 m (98 ft) chalk line with a level vial built into the case — so the line can be checked for level as it is set, without a second tool.

    Amazon reference
    B07FWD28H1 (identical on 5 markets)
    EAN
    6903366453425
    Stated dimension or range
    30 m (98 ft) line
    Body and fittings
    stainless hook
    Reference and mounting
    integrated level vial
    Supplied
    chalk included
    • A level vial built into the case, so a horizontal line is set and checked with one tool
    • A stainless hook, which is the part that rusts and then stains every line you snap
    • No gear ratio published — rewinding 30 m (98 ft) by hand is slow

    Best for: Setting a level line where carrying a separate spirit level is one tool too many.

    Search Amazon for this model
  • IRWIN Strait-Line Layout Pro chalk reel with steel handle

    IRWIN Chalk reel, 100 ft, 2:1 gearing

    The second slowest gearing on this shelf, chosen deliberately: a steel handle and a large hub for torque rather than turns.

    Stated dimension or range
    100 ft of heavy-duty braided line, stated to resist fraying and breaking over long distances. No line diameter appears
    Functions
    A 2:1 gear ratio, stated to rewind twice as fast as a traditional reel. It is the second slowest of the published ratios on this shelf — against 6:1, 5:1, 4:1 and 3:1 above it and 1:1 below — and that is the trade the rest of the specification explains
    Body and fittings
    A robust steel handle and a large center hub, stated for increased durability, strength and torque, plus a steel docking ring for secure anchoring. It is the only reel on this shelf with steel named for both the handle and the ring
    Material
    Steel handle and steel docking ring, stated. The shell material is not named
    Reference and mounting
    A steel docking ring for secure anchoring, stated — a ring rather than a hook, which takes a nail or a screw rather than hooking an edge
    Supplied
    A large sliding door for easy chalk fill, stated, and a large chalk capacity for fewer refills on large jobs. No chalk is stated as included, and no sealing organ is described
    Amazon reference
    B0C31WBF5F
    EAN
    0885911819244
    • A steel handle, where most reels here are plastic
    • A steel docking ring rather than a bent hook
    • 2:1, the second slowest ratio published on this shelf

    Best for: Heavy chalk, a long line and a reel that will be cranked hard rather than quickly

    ≈ $28
    Check price on Amazon

Elsewhere in the spares drawer

  • DEWEPRO telescopic measuring staff with its base plate on soft ground

    DEWEPRO Telescopic leveling staff, 5 m (16 ft) with base

    A 5 m (16 ft) staff supplied with its base plate — the part that decides whether the staff stands where you put it rather than sinking into the ground.

    Amazon reference
    B082YCC391 (identical on 3 markets)
    EAN
    4016515038014
    Body and fittings
    5 m (16 ft) telescopic
    Reference and mounting
    base plate included
    • A base plate is included, which most staffs do not supply
    • Telescopic to a stated 5 m (16 ft)
    • No material, section count or scale detail published

    Best for: Leveling on soft or uneven ground, where the foot of the staff needs somewhere solid to sit.

    Search Amazon for this model
  • heninhill telescopic height measuring rod extended against a bridge soffit

    heninhill Telescopic height rod, 6 m (20 ft)

    The longest rod here at 6 m (20 ft), folding to 110 cm (43.3 in) to fit a vehicle cab, with a small gear mechanism for precise horizontal setting.

    Amazon reference
    B0F2F9MCR4 (identical on 6 markets)
    EAN
    0740863925040
    Stated dimension or range
    6 m (20 ft) · folds to 110 cm (43.3 in)
    Scale
    dual metric and imperial scale
    Body and fittings
    gear adjustment
    • Six meters, the longest reach in this hub
    • Folds to a stated 110 cm (43.3 in), so it travels in a cab rather than on a roof
    • Aimed at vehicle height measurement rather than leveling

    Best for: Checking clearances and heights — bridges, doorways, loads — rather than leveling to a laser.

    Check price on Amazon
  • Firecore 16 ft telescopic aluminum grade rod with bubble level

    Firecore Grade rod, 16 ft, 5 sections, feet/tenths

    The clearest statement of its two faces on this shelf: tenths one side, inches the other, and no claim that either is inverted.

    Scale
    Graduations on BOTH sides: front in feet and tenths, back in feet and inches — stated exactly that way, and it is the clearest statement of its two faces on this shelf. Note what it does NOT claim: the back is a different UNIT, not an inverted direction. This shelf's introduction distinguishes those two kinds of second scale, and four listings here blur them
    Body and fittings
    Five telescoping sections reaching 16 ft, with injection-molded sectional joints and high-strength locking buttons stated for extra stability. This shelf's buying tip says to check that every section locks positively; this is one of three rods here that names the locking mechanism at all
    Stated dimension or range
    16 ft extended, collapsing to 4 ft. Both figures are published — and four feet is the longest fold of the three 16 ft rods on this shelf, where another folds to 42 in
    Material
    Anodized aluminum sections imprinted with weather and corrosion-resistant inks, stated lightweight aluminum alloy. No thickness figure and no alloy designation appears
    Measuring mode
    A bubble level, stated in the title. No tripod thread and no receiver clamp
    Supplied
    Nothing beyond the rod is stated — no bag, no strap, no end caps and no spare parts, where four rods on this shelf include a case
    Amazon reference
    B07VC69SYK
    EAN
    0782337439530
    • Front and back faces stated plainly: tenths one side, inches the other
    • Both extended and folded lengths published
    • Folds to 4 ft, the longest fold of the three 16 ft rods here

    Best for: Working with an engineer's level in tenths and a tape in inches, without converting either

    ≈ $49
    Check price on Amazon

All chalk lines