HIPA (Set of 5) Carburetor adjustment tool Pac Man / Single D / Double D / Hexagon Hex Socket / 21-Teeth Splinded Screwdriver for Common 2 Cycle Small Engine 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 Tool is designed for Certified Technicians to tune carburetors, and keep engine within EPA specs Package include: 21-Teeth Splinded / Pac Man / Single D / Double D / Hexagon screwdriver Note: The 21-teeth Splined tool is used on ZAMA carburetors. Wablro carburetor may need a 22-teeth splined tool