10 Pieces Upgraded Carburetor Adjustment Screwdriver Set. Comes with 21 Splined Teeth + 7 Splined Teeth + Single Head D + Single Head D + Double D + Pac Man + Small Head Pac Man + Hexagon + Shapde + Six Carburetor Cleaning Tools. Easy to adjust your 2-cycle small engine carburetor. A complete repair tool for adjusting most carburetors for 2-cycle small engines, such as Stihl, Husqvarna, Poulan, Troy-Bilt, Ryobi, Craftsman, chainsaw, weed eater, blower, lawn mower, trimmer, etc. Keep your engine within EPA specifications and running perfectly. Heavy-duty carburetor adjustment head, ergonomically designed square handle, more convenient and comfortable to adjust the carburetor, easy 1/4 turn increments on mixture adjustments. Marked with tool type on the handle, easy to recognize the carburetor rebuild screw tools. Comes with a tool kit, keeps all 8 tools organized in one place.