This 12-piece carburetor adjustment tool kit is specifically designed for chainsaws and other small two-stroke engines, compatible with brands such as STIHL, Husqvarna, Poulan, Weedeater, Echo, Homelite, and Ryobi. It is ideal for adjusting the common carburetors on these machines. The kit includes a variety of bits: 21-tooth spline, 7-tooth spline, single D, small single D, double D, Pac-Man, small Pac-Man, hexagon, shaped, six-star, large circle, and small circle. These bits are made of hardened steel with advanced heat treatment for increased corrosion resistance. The square handles of the screwdrivers make it easy to distinguish the 1/4-turn increments when adjusting the carburetor's fuel mixture settings. The kit comes with a practical carrying case and a carburetor cleaning kit, making tool storage and maintenance easy. It is important not to leave this equipment within reach of children or vulnerable individuals unsupervised. In case of malfunction, it is advisable to immediately stop using it and contact customer service.