The Shakespeare Brush Cutter Trimmer Head is equipped with durable metal blades to easily cut thick weeds and brush. Universal fit for 99% of all gas straight-shaft trimmers. Ideal for cutting thick weeds and brush. Uses 3 replaceable and durable metal blades that meet ANSI safety standards. Includes 3 durable metal blades and an adapter kit for easy installation. No. 17257: Line Advance: Fixed Shaft: Universal Line Diameter: N/A Pkg Qty: 1 Package Type: Card