JRL Carburetor Adjust tool Screwdriver Fit Chainsaw Blower Trimmer Carb Single D - Double D - Packman - Spline, Single D 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 Package include: 7-Teeth Splined / Pac Man / Single D / Double D Note: The 7-teeth Splined tool is used on ZAMA carburetors. Tool is designed for Certified Technicians to tune carburetors, and keep engine within EPA specs