Metal chalk liner, string length 30m, use: marking of transitions - lines in construction, painting, SDK, ..., after filling with the included powder (blue - can be ordered: blue 37096, light blue 37094, red 37097, light red 37095, black 37098), procedure: fill the chalk liner with the enclosed powder, color it by shaking and repeatedly pulling out and rewinding the string, then tighten the string in two in the required place marking the line and lightly strum - thus applying the powder caught on the string in a thin layer on the marked material, then we wind the string, or refill with powder, packaging: blister with euro hole. [***]