ABS Material Spool Cap Material strength: Made of ABS plastic for strength and longlasting durability. Easy snapin installation: Snaps into place over the spool line for quick, tool assembly. Secure and protective: Keeps the line securely in place on your string trimmer and prevents loosening during use. Key benefits Durable construction resists breakage during regular trimming tasks. Quick installation reduces downtime when servicing the spool. Provides line protection to help maintain consistent line position and cutting performance. What it is and how it works This spool cap is designed to sit over the spool line on your string trimmer, providing a secure housing that protects the line and prevents it from coming loose during operation. Use scenarios 1) Routine lawn maintenance: or install the cap during spool maintenance to resume trimming quickly. 2) Edge trimming along driveways and fences: keeps the line fixed in place for clean, precise edges. 3) Trimming in dense or rocky areas: protective cap reduces line displacement and breakage during tough use.