[10-item set] This carburetor adjustment tool kit includes 10 items: 21-tooth spline screwdriver, 7-tooth spline screwdriver, single-D small-bit screwdriver, double D screwdriver, slotted screwdriver, hexagonal screwdriver, six-point star screwdriver, and three specialty tip screwdrivers. Offers a comprehensive selection of carburetor adjustment tools. Compatible with the vast majority of 2-stroke engines, including chainsaws and equipment from various brands that use splined set screws. Made from robust stainless steel with ergonomic handles and durable metal shafts for long-lasting performance. Includes a convenient carrying case for easy storage and organization. Also includes cleaning needles and brushes to help clear obstructions in narrow carburetor passages. These carburetor adjustment tools are essential for maintaining and tuning 2-stroke engines. Proper carburetor adjustment helps regulate engine idle speed and optimize fuel-air mixture, contributing to improved engine performance.