Irwin 4935522 Permanent Marking Chalk Refill, 2 Lb, Crimson Red Stick Oil-based formula provides superior rust

Oil-based formula provides superior rust protection

H1 Stem Hex: 18 mm

Coverage area: 75 Sq-Ft

Mounting holes are located in the bottom of the box for direct mounting

7mm rim height for a longer life and for increased cutting contact with the blade

Irwin 4935522 Permanent Marking Chalk Refill, 2 Lb, Crimson Red Stick Oil-based formula provides superior rustHighlights: Size: 2 Lb Color : Crimson Red Composition: Red Iron Oxide Pigment Red 101, Talc, Silica Form: Powder Specific Gravity: 4. 5 Type: Permanent Staining Stains surfaces Visible after weeks of weather exposure and jobsite wear. Reduces need for spray sealant. The flip top cap seals the chalk in an airtight chamber Keeping out moisture and reducing the risk of clumping