Complete set for trimming: package includes 2 blade bases essential for replacing old or damaged components on your cordless grass trimmer to maintain cutting performance. Construction: made from a combination of plastic and steel, these blade bases are built to withstand outdoor use while preserving functionality. Userfriendly design: straightforward installation on a range of trimmer models, streamlining your lawn care routine. Usage and compatibility: compatible with trimmers and lawn mower blades, addressing grass trimming needs across different terrains. Key attributes: function, compatibility, material, and performance; includes 2 bases per package. Use scenarios: worn bases after trimming in rough or rocky areas to restore cutting efficiency. Keep a spare set on hand for seasonal maintenance to minimize downtime during mowing. Swap in bases when upgrading an older trimmer to maintain even cutting and balance.