This tool is designed for technicians certified to adjust the carburetor and service the engine according to EPA regulations Used for most two-stroke engines; fits many brands of equipment including Sears, Craftsman, Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite and any equipment using slotted screws. High Quality and Durable Materials: The plastic handles are comfortable to hold and the metal rods are durable and well made. Note: The 7 tooth spline tool is used for Junma carburetor. Package includes: 7 Spline Teeth / 21 Spline Teeth / Pac-Man / Single D / Double D / Hex Screwdriver > see product chart Quantity: 6 2 Stroke Carburetor Adjustment Tool Kit includes 6 carb kits: 21 spline teeth x1 7 spline teeth x1 Pac-Man x1 Single D x1 Double D x1 Hexagon x1 Tool Details Ergonomic handle and metal shaft comfortable to hold and durable. Tool Length - 5.68-6.22" Heavy duty and easy to adjust coupler head carburetor, so your engine will meet EPA regulations and can fit most brands, such as Sears, Craftsman , Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite Note: The spline tool is specially designed for Junma carburetor, but not for WALBRO carburetor.