Our unique multi-applicable shaft bolts and stud systems make our replacement cutting heads fit 93% of all brand gas trimmers in the market today, including John Deere, Homelite, Ryobi, Weedeater, Craftsman, Echo, Stihl, Toro, Husqvarna, Troy Bilt, Shindaiwa, Cub Cadet, MTD, Snapper, Honda, RedMax, Poulan and many other brands. Grass replacement heads are easy to install and use. When you source our products you can be confident that you are offering your customers the absolutely best world-made cutting heads and accessories.