Cuts 1/8" and 3/16" widths, has four notches for leather up to 7 oz. weight.  Uses injector razor blades, easily changed.  To use, cut a 1-1/2" hole in the center of leather.  Start thong slowly guiding with left hand.  When thong is a few inches long, grasp end and pull firmly allowing leather to rotate around tool.  Laces 20' long can be made in seconds.  A practical tool that really works. No. 853784 Replacement blades available No. 853002.