Compatible Models: Compatible with Decker Black Trimmer: GH900, GH600, LSTE525, LST300, BESTA510, LCC340C, LST522, ST8600, ST7700, ST6600, NST2118, NST2018, NST1118, NST1118, MST912, MTE912, MTE20225T, LSTE20225, LSTE20225, LSTE20225 , LST140C, LST136W, LST136B, LST136, LCC222, LCC221, LCC140, GH912, GH610, GH500, GH400, CST2000, CST1200, CST1000, CST1000, BESTE620, BESTE512. Black + Deacker protective cap, cap model: RC-100-P, part number: 385022-03. Compatible with AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2 coil models. Material: ABS material, strength and durability. Easy to install, no complicated processes. Advantage: bayonet design base based on the original trimmer structure, holds the spool in place, no tools required, tighten the spool and keep it in place. safety while mowing. Use: It protects the line and keeps the spool in place.