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
21 splinded teeth, for ZAMA carburetors
Walbro carburetors may need a 22-teeth splined tool