HIPA Carburetor Adjustment Tool Kit Screwdriver # 530035560 for 2 Cycle Poulan Homelite STIHL Husqvarna Echo Chainsaw Trimmer Lawn Mower Edger Replace manufactuer part number: 530035560 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 for Certified Technicians to tune carburetors, and keep engine within EPA specs Notice: the plined tool is designed to adjust ZAMA carburetors, it won't fit WALBRO carburetors which may need a 22-teeth tool tool is updated from previous 7-teeth to current 21-teeth, better quality