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. 【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. 【Function】Double 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. 【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. 【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: 22.5cm/8.86inch 20.5cm/8.07inch   Package Includes: 2 Pieces Engine Valve Lapper Note: Please allow slightly errors 1-2cm differences due to manual measurement.