Eliminates the hassles and frustration of bump and feed type heads. Fits most straight shaft gas models for Homelite Ryobi Husqvarna Sears Craftsman Weed Whacker McCulloch Toro John Deere and Weedeater. Fits most models for Echo. Blades change in seconds. Use for heavy grass and weeds where edging requirements are minimal. Easiest bladed head available to install. No tools required. Replacement blades 4610 available (1223-0942). Carded. Length: 2.5. Width: 9.8. Height: 6.75