High speed-rapid rewind and a free-wheeling line out feature make the Keson Model GB-1 the preferred chalk line of professionals. The high speed rewind is 3 1/2 times faster than that of conventional chalk line reels. Simply push the study handle to the side and the line is free wheeling-without the handle spinning. Release the pressure and the linelocks in place. There is also a line lock position for setting a plumb line. All this is accomplished through our exclusive bear/clutch design. The chalk line reel has a corrosion free, chrome-plated scratch-free A.B.S. case which is lightweight but exceedingly strong. Includes a quick fill self-sealing rubber grommet for fast refiling and 100ft. of spun coton/poly line with a metal catch hook.