UnionZone&reg; 4 Pieces Splined 2 Cycle Carburetor Adjusting Tool for Craftsman,Carb Adjustment Tool Used on most 2 cycle engines; Fits many brands of equipment, including Sears, Craftsman, Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite, and anything else that utilizes the splined adjustment screws Can fit most brand like Sears, Craftsman, Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite. There are many other styles and options on carburetors, so please check before purchasing to make sure these will work for your needs Fits many brands of equipment, including Sears, Craftsman, Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite, and anything else that utilizes the splined adjustment screws. ***Tool is designed for Certified Technicians to tune carburetors, and keep engine within epa specs, and is sold as such. 4 Package include splined x1, pac man x1, single D x1 and double D x1 6 Package include: 21-Teeth Splinded / 7-Teeth Splined / Pac Man / Single D / Double D / Hexagon screwdriver