Меловые шнуры и сменные блоки

A Chalk line or also known as a Chalk box is a simple hand tool that consists of a box filled with chalk powder with a reel of string inside it. The chalk lines are a tool for marking long, straight lines over distances onto the surface of an object to provide accurate guides where using a ruler or straight edge tool would be impractical. On the end of the chalk powdered string is a metal hook ...