DECOHS 10mm Jam Nut Valve Adjustment Tool- Multi Function Valve Lapping Grinding Tool- Slotted Valve Adjusting Stud- Valve Lash Adjustment Tool for Japanese Car Engines Package includes: 1 Pc x 10mm valve adjustment tool Specification: Color: black, blueMaterial: plastic, rubber, stainless steelSize: 7.5 x 8.2 inch Features: (1)The integrated design eliminates the need for multiple tools, and the valve adjustment becomes convenient and accurate, improving the efficiency. (2)This valve adjustment tool for Japanese automotive engine valve clearance adjustment, comes with a 10mm clamp nut and slotted valve adjustment stud. (3)The valve grinding tool can loosen or tighten the clamp nut, easy to force when used, check the position of the screwdriver blade, and accurately align with the valve studs.