Widely used--Must have for 2 Cycle engines to keep them in good performance: Fits for ZAMA, Walbro, STIHL, Husqvarna, Poulan, Weedeater, Echo, Homelite, Ryobi, MTD, Troy-Bilt,Toro, Sears, Ruixing, Huayi; string trimmer, chainsaw, leaf blower, hedge trimmer, edger, pole pruner and anything else that utilizes the carburetor adjustment tool. Clever design--Squared handles, which makes it easy to tell 1/4 turn increments on the mixture settings when trying to tune a carburetor; Advanced heat treatment process and corrosion-resistant finish screwdriver bits. Cleaning kit--is high density nylon, good elasticity, no hair loss. Stainless steel wire winding, anti-rust, flexible handle, no deformation. It can be used to clean carburetor and fuel lines.Cleaning kit include: 1pc hex wrench + 6pcs cleaning needle + 6pcs cleaning brush which can be used to clean carburetor and fuel lines. You will get--10pcs carberator adjustment tool,1 carburetor cleaning kit,1 tool carrying case.