Carburetor adjustment tool Pac Man / Single D / Double D / Hexagon Hex Socket / 21-Teeth Splined / 7-Teeth Splined Screwdriver for Common 2 Cycle Small Engine (Set of 6) Tool is designed for Certified Technicians to tune carburetors, and keep engine within EPA specs 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 Note: The 7-teeth Splined tool is used on ZAMA carburetors. Package include: 7-Teeth Splined /21-Teeth Splined / Pac Man / Single D / Double D / Hexagon screwdriver