This tool is designed for certified technicians to adjust the carburetor and maintain the engine in accordance with 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 grooved 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 Tooth/21 Spline Tooth/Pac-Man/Single D/Double D/Hex Screwdriver>see product table. Quantity: 6 The 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 Steel Shaftmetal comfortable to hold and durable.Tool Length - 5.68-6.22" Heavy duty, easy to adjust coupling head carburetor, so your engine meets EPA regulations and can fit most brands, such as Sears, Artisan, Poulan, Husqvarna, Weedeater, Echo, Toro, Ryobi, Homelite Note: The spline tool is specially designed for Junma carburetor, but not for WALBRO carburetor.