Description: Feature: This Double Ended Valve Lapping Sticks set includes a manual wooden rubber valve grinding rod, good for hand grinding valves, cleaning and removing carbon deposits on the valve to ensure efficient operation of your equipment. _x000D_ Material: Double Ended Wooden Grip Valve Grinding Stick Hand Lapping Tool Lapper Set Made from rubber and wood, this tool is oil and oil resistant. Easy grip handles for better control. _x000D_ FunctionDouble Ended Valve Lapping Sticks Great for hand lapping small and large head unslotted lapping valves,improving efficiency of devices.Make sure valves seat perfectly during a top end rebulid. _x000D_ Dimensions: The total length of the rods are 22.5cm/9" and 20.5cm/8", with handle diameters of 17mm/0.7" and 23mm/0.9". The suction cup diameters are 2cm, 1.5cm; 2.8cm,3.5cm respectively. _x000D_ Versatile Use: Suitable for any small engine such as motorcycles, cars, lawnmowers, chainsaws etc., it's ideal for cleaning and smoothing surfaces. Specification: Material: Wood Rubber Size Chart: _x000D_ 22.5cm/8.86inch _x000D_ _x000D_ _x000D_ _x000D_ 20.5cm/8.07inch _x000D_ _x000D_ _x000D_ Package Includes: 2 Pieces Engine Valve Lapper Note: Please allow slightly errors 1-2cm differences due to manual measurement. _x000D_