HYBRID SYSTEM: Plug in trimmer line to cut through lawns, or attach the included blades to slice through light brush. Maintain most types of lawns COMPATIBLE WITH 0.095” TRIMMER LINE: You can use different brands on this head, as long as the size matches. Cut it, loop it, then use it until it wears out SWIVEL HEADS help reduce damage to the strings by absorbing shock sustained from running into fences or concrete NO TOOLS REQUIRED: Replacement is fast and easy with the included converter rings. Simply screw in and you’ll be ready to go FITS MOST GAS TRIMMERS: Compatible brands include: Ariens, Bolens, Craftsman, Cub Cadet, Echo, Green Machine, Hofco, Homelite, Husqvarna, IDC, John Deere, Jonsered, KAwasaki, Lawn Boy, - - - Makita, McCulloch, Mitsubishi, MTD, Murray, Paramount, Poulan, Redmax, Robin, Ryobi, Sachs Dolmar, Snapper, Solo, Stihl, Tanaka, TMC, Toro, Troy Bilt, and Weed Eater