SUNREEK8482;Carburetor Adjustment Tool Pac Man/Single D/Double D/Hexagon Hex Socket / 21-Teeth Splined Screwdriver for Common 2 Cycle Small Engine (Set of 5) Tool is designed for Certified Technicians to tune carburetors, and keep engine within EPA specs Package include: 21-Teeth Splined / Pac Man / Single D / Double D / Hexagon screwdriver Wablro carburetor may need a 22-teeth splined 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