Multi-surface marking chalks allowing writing and drawing on wood, metal, stone, concrete and tile. A pack of twelve professional marker chalks in red, each clothed in a paper sleeve. A practical hexagonal shape preventing rolling, with a diameter of 12 mm (0.47 in) and a length of 120 mm (4.72 in).
Where graphite fails
A pencil works by leaving graphite in the surface texture. On smooth, dark, wet or dusty material there is nowhere for it to go, and the line is invisible from a meter away. Wax and chalk crayons sit on top instead, which is why every trade that works on masonry carries them.
The paper sleeve
It keeps the crayon together as it wears and keeps your hand clean. Both matter more on a full box than they sound on one crayon.
Availability
Read on the day this page was built: $18 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 31 August 2026. The live price is at the top of the page.
What gets asked here
Why hexagonal?
Because a round crayon rolls, and a crayon that rolls off a joist at height is gone. It is the same reasoning behind flat carpenter pencils, and it matters more than it sounds.
When is chalk better than a pencil?
On anything dark, rough or dusty. Graphite disappears on stone, brick and dark timber; a wax or chalk crayon writes over the dust rather than into it.
Does the mark come off?
The listing does not say. Treat a red marking crayon as difficult to remove from a finished surface, and use it where the mark will be cut, covered or weathered away.
Two ounces of chalk at twenty dollars, with neither the color nor the grade published — the two things this shelf says decide everything.
Also stated
NO Color and NO GRADE. This shelf's introduction opens on it: chalk comes in two grades and choosing wrongly is not recoverable — temporary brushes off, permanent survives weather and also survives being wrong on a finished wall. This listing states neither, and the buying tip says the color is what normally tells you
Stated dimension or range
Two bottles of one ounce each, at twenty dollars thirty-seven — about ten dollars nineteen an ounce. The other bottle on this shelf is eight ounces for two dollars ninety-eight, or thirty-seven cents an ounce: this is twenty-seven times the price per ounce of powder
Functions
Intended for use with construction MARKERS and marking pen systems rather than a chalk reel — deep-hole marker pens, an Ox pencil, Pica pencil systems and a Tracer TrueShot chalk marker are all named. That is the real distinction on this shelf: a one-ounce bottle with a narrow neck fills a marker cartridge, where an eight-ounce bottle is sized for a reel
Supplied
Two 1 oz containers, stated as a practical multipack and as a gift-ready set. The fifth of five bullets is the gift suggestion
Material
A formula stated optimized for consistent flow and visibility. No fineness figure, no grain size and no material description appears — and fineness is one of the five things this shelf's introduction compares
Reference and mounting
Recorded under the brand "Generic" with the reference US TAPE - DURAMRK - 76700. US Tape is a real layout-tool maker and DuraMark its chalk line; the Generic brand field is a marketplace artefact rather than the product
Amazon reference
B0GV694V9Q
EAN
0840512248763
Sized for a marker cartridge rather than a reel
Compatible systems named: Ox, Pica of the marking pencils shelf, Tracer TrueShot, deep-hole pens
No color stated at all
Best for: Refilling a deep-hole chalk marker, once the color has been confirmed with the seller
The only marker here that tells you both how long its tip is and which lead color works on dark stone.
Stated dimension or range
A long narrow tip of 6 mm (0.24 in) DIAMETER and 45 mm (1.77 in) LENGTH, stated, for marking deep holes, gaps, tight corners, hinges and fittings. It is the ONLY tip dimension published on this shelf — one other marker says extra-long needle-nose and gives no figure — and both numbers matter: the diameter decides which hole it enters and the length decides how far down it reaches
Supplied
SIX leads: four graphite plus one yellow and one red — and THORVALD is the only maker here to say what each color is for. Graphite for wood, metal, drywall and light surfaces; yellow and red for stone, ceramic, concrete and dark materials. This shelf's introduction says graphite disappears on dark stone where white or red shows, and this is the listing that acts on it
Body and fittings
A protective holster with an integrated sharpener and a quick-clip attachment, stated for one-hand access on a ladder or overhead. The holster is where the sharpener lives, which means it cannot be lost separately — and the clip is what keeps the marker off the floor
Material
A soft-touch grip stated to hold firmly with dusty, sweaty or wet hands, in a heavy-duty holster and body stated to resist drops, dust, moisture and impact. A high-visibility orange body, stated — which on a site floor is the difference between finding it and buying another
Functions
Mechanical lead advance. No lead HARDNESS is published — no HB, no 2B, nothing — and neither is a lead diameter, where two markers on this shelf state 2.8 mm (0.11 in). This shelf's introduction says lead hardness and color decide which surfaces take a mark; this listing answers the color half completely and the hardness half not at all
Also stated
Named for plumbers, trim installers, cabinet makers, metalworkers and finish carpentry, and separately for electricians, framers, roofers and HVAC. Every tool inspected before shipping, stated
Amazon reference
B0G7G86R3D
EAN
3760394610069
The only published tip dimensions here: 6 mm (0.24 in) by 45 mm (1.77 in)
Six leads, with the color-to-surface match written out
No lead hardness published
Best for: Marking through a hinge recess or a fixing hole on concrete, where graphite shows nothing
A marker built to reach through a drilled hole or into a recess — a 6 mm (0.24 in) tip on a 43 mm (1.69 in) reach, which no flat carpenter pencil can do.
Amazon reference
B0BD8J7K6F (identical on 6 markets)
EAN
3760312570567
Stated dimension or range
6 mm (0.24 in) tip · 43 mm (1.69 in) reach
Marking medium
seven leads
Body and fittings
integrated sharpener and clip
A 6 mm (0.24 in) tip on a stated 43 mm (1.69 in) reach, so it marks through a hole or into a recess
Seven leads supplied, with an integrated sharpener and a clip
A narrow lead breaks more readily than a carpenter pencil's
Best for: Marking through an existing hole — the job a flat pencil physically cannot reach.
