The LBK trimmer Spool replacement eases the tedious work of hand-winding spools. Designed for use with Black and Decker auto feed string trimmers, the 60-foot factory-wound replacement spool features a .080-inch/2.0mm diameter line utilizes centrifugal force to automatically feed the cutting string while eliminating bumps and hitches. Fits: GH3000 Black+Decker 7.5-Amp Electric String Trimmer 20 ft./6.1m 0.080"/2.0mm Replacement Line . Made In USA , last longer !