Valve Lapper Set 2 Pc Cutting Paste Hand Lapping Tool Cylinders Piston Grinding Selling point: To properly recondition the valve seat and valve during an engine top-end rebuild, use the Valve Hand Lapping Grinding Tool Kit 2-Piece Set Dual-End Suction Cup Lap Stick Pack. They are suitable for 5/8-inch, 13/ 16-inch, 1-1/18-inch, and 1-3/8-inch valves. The 8.9-inch and 8.3-inch overall lengths with 6.75-inch long handles make these tools useful for even installing and removing recessed fixtures or Clean-to-reach mini-flood light bulbs. Clean the application surface, install the valve in the valve guide, press the correct size suction cup firm onto the head of the valve, and lightly spin the tool handle between the palms of your hand (as if trying to start a fire) until a suitable finish is obtained. Lapping/grinding compound recommended, not included. ACCURATELY SEAT VALVES: The Valve Hand Lapping Grinding Tool Kit 2-Piece Set Dual-End Suction Cup Lap Stick, 1-1/8, 1-3/8, 5/8, 3/16 Inch helps you Proper match valve seats during an engine top-end rebuild; These tools include dual ends with oil and UV-resistant synthetic rubber cups that help you put the finishing touches on your tune-up. VARIOUS APPLICATIONS: Suitable for any clean, flat surface of a lawn mower, chainsaw, or small or large engine car or other vehicle with 5/8-inch, 13/16-inch, 1-1/18-inch, and 1- 3/8-inch (1.6cm, 2.1cm, 2.9cm, 3.5cm) valves; 8.9-inch and 8.3-inch (22.6cm and 21.1cm) overall lengths make these tools useful for even installing and removing recessed fixtures or hard- To-reach mini-flood light bulbs. GRIP COMFORTABLY: 6.75-inch (17.1cm) long handles for ultimate control, less user fatigue, and more productivity; 8.9-inch and 8.3-inch (22.6cm and 21.1cm) overall lengths. EASY TO USE: Clean all carbon deposits off valve and wipe down each valve, install valve in valve guide, press correct size suction cup firm onto head of valve, and lightly spin tool handle between palms of your hand (as if trying to start a Fire) until a suitable finish is obtained; We recommend placing valve lapping/grinding compound (not included) on valve seat or valve surface (keep compound off the top surface of the valve to ensure proper suction). Product: Large length: 225mm Small length: 205mm Handle material: birch Top part material: natural rubber Color: yellow + black Note: Dear buyer: Due to lighting effects, display brightness, manual measurements, etc., the color and size between the photo and the current project may vary slightly. Sincerely hope that you can understand Thank you Include: 2xHand Lapping Tool