Compatible with multiple models of Black+Decker trimming machine, including the GH series, ST series, CST series, MTE series, NST series, LST series, and more. Please refer to our model images for details. The centrifugal force automatic feeding and trimming machine reduces the hassle of manually sorting and changing the trimming line spools during the work process. This set includes 3 trimmers spool This trimmer line is made of upgraded nylon polyamide material, with a tensile strength of over 100 pounds, offering 30% greater durability than other brands and a longer lifespan.