Clean all carbon deposits off valve and valve guide; Use a thin layer of engine valve lapping compound (not included) around the valve and install the valve in valve guide, Press correct size valve suction cup tool firmly onto head of valve, and use your power drill to slowly spin (1200rpm) the small lapping tool until a suitable finish is obtained

Set contains:
1pc small engine valve lapping tool attachment,
5pcs of suction cup adapters for use with your automotive, motorcycle, ATV, and small engine valves.