– Double ended grip valve grinding lapping stick tool set to help properly match valve seats during an engine top-end rebuild – Dual ends with oil and UV-resistant synthetic rubber cups that help put the finishing touches on every tune-up. – Features a 9 inch and a 7 inch sticks – Long easy-grip handle for better control, less user fatigue, and more productivity – Larger stick cup size: 1-1/8 inch (28mm) and 1-3/8 inch (35mm) cups