[Accurate Valve Installation]Use this tool to correct surface irregularities and eliminate subsurface damage to new valves for a perfect valve installation into the valve guide, helping you accurately install valves and seat them properly into your vehicle's engine. [Features]: Includes 5attachable suction cups to fit and install valves of sizes on lawn mowers, chainsaws, cars or motorcycles. handles that fit your drill bits and an included suction cup. [Instructions]: Use a thin layer of engine valve abrasive (not included) around the valve and install the valve in the valve guide. Press the correct size valve suction cup tool firmly onto the valve head, then use an electric drill to slowly Slowly rotate the small valve grinding tool get the right finish. (Working speed: maximum 1000rpm to 1250rpm). Specifications: for your Car, Motorcycle, ATV and Small Engine Valve Small Suction Cup Tool 20mm Adapter stands at 1 inch (2.5 cm), The 30mm adapter stands at 1.1 inches (2.8 cm), the 35mm adapter stands at 1.5 inches (3.8 cm), and the 45mm adapter stands at 1.5 inches (3.8 cm) Material: metal+rubber colour: As Shown Package Contents: 1 x grinding tool attachment 5 x suction cup adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.