Chalk Line
Updated: Dec. 08, 2010
A case, filled with chalk and 15 m to 30 m (50100 ft) of line on a reel, marks a long, straight line between two points.
Pull the line from the case, hold it taut, and snap it to leave a chalk mark as a guide. Can also be used as a plumb bob. The longest straightedge you can buy.
Originally Published: December 08, 2010
