Feature Highlights: 1. Wide Compatibility: Designed to fit a comprehensive range of Black & Decker string trimmer and edger models, including GH900, GH600, LST201, NST2018, CST2000, and many more. Also compatible with Weed Eater trimmers. 2. Secure Replacement: Functions as a direct replacement for the BLACK+DECKER AF-100 spool cap (Part No. 385022-03, Model RC-100-P). Holds the spool firmly in place. 3. Durable Construction: Made from high-strength ABS material for excellent durability and impact resistance. 4. Easy Installation: Features a bayonet-style base that locks onto the original trimmer structure. No tools are required—simply tighten to secure the spool safely during operation. 5. Complete Set: Package includes 4 spool covers and 4 corresponding springs for multiple replacements or spools. Product Details: This spool cap set ensures your trimmer line stays protected and your spool remains securely fixed. The robust ABS construction provides long-lasting performance, while the intuitive bayonet design allows for quick, tool-free installation. It is the ideal maintenance part for keeping your Black & Decker or Weed Eater string trimmer in optimal working condition. Specifications: - Material: ABS Plastic - Contents: 4 x Spool Covers, 4 x Springs - Compatible Line: Use with .065" line. - Key Replacement For: BLACK+DECKER AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2 coil models.