This is the original GAMMON REEL plumb line reel which was designed for use in the construction field and comes with 12 feet of fluorescent red plumb line. When you reach for your plumb bob the GAMMON REEL plumb line reel is automatically in the palm of your hand allowing for simple and fast plumb bob set-up and adjustment. When your plumb bob is not in use, the 12 foot plumb line is quickly retracted in the plumb line reel thus eliminating tangled, broken and muddy string and reducing neck burns and other plumb line accidents. Plumb bob is sold separately.