CHALK REFILL

IRWIN® STRAIT-LINE® hi-visibility marking chalks are mainly used for exterior which is ideal for low light conditions and on dark surfaces and to show layout changes and corrections. The newly engineered flip-top cap that keeps the chalk in the bottle where you want it and stops it from spilling out in areas that you don.t. The flip-top cap, available on all chalk bottles, seals the chalk in an airtight chamber, keeping out moisture and reducing the risk of clumping. The marking chalk is visible after weeks of weather exposure and job site wear.