The Stringliner 1/2 lb Twisted Pro Reel Reloadable Construction Line is an ideal tool for getting nice, straight markings. Its spool can be reloaded easily and allows you to use either the clip on crank, or a standard power screwdriver to rewind it. This nylon line is made from high impact polyethylene. It even comes in a bright pink color for easy visibility. The line is strong, and twisted. It features a thumb brake drag and a sturdy handle to withstand heavy use.