The Makita B-60109 Commercial Grade Automatic String Bump & Auto Feed Trimmer Heads, Universal LH (2-Pack) are replacement trimmer head assemblies designed to deliver efficient grass trimming, dependable line advancement, and smoother cutting performance for compatible Makita string trimmers and brush cutters. Engineered with automatic bump and auto-feed functionality, these trimmer heads help advance cutting lines quickly during operation, reducing downtime and improving trimming efficiency for residential, landscaping, and commercial maintenance applications. Designed with universal left-hand thread configurations for secure attachment and dependable rotation control, they are compatible with Makita RBC251, RBC310, and RBC311 string trimmer models. Constructed from durable plastic and metal components, these trimmer heads are built to withstand repeated ground contact, vibration, and demanding outdoor use while maintaining reliable line feeding and consistent trimming performance. Their commercial-grade designs support efficient vegetation cutting, improved user convenience, and dependable operation for lawn care professionals and property maintenance users. |