Valve Grinding Tool Set 2PCS with Double Ended Grip for Car Motorcycle Engine Maintenance Features： 1、Sturdy Grinding Head: Valve lapper set is outfitted with a rubber grinding head that is stronger and more wear resistant than plastic grinding head discs, preventing detachment. 2、Wide Application Range: Suitable for most engine cylinder dust grinding, the valve grinding tools are ideal for any clean, level surface of a mower, chainsaw, or small or large engine car or other vehicle with a valve. 3、Easy To Use: With manual operations, you can freely control the force and rotation speed according to your needs, for a more enjoyable and flexible grinding process with these valve lapping grinding tools. 4、Variable Grinding Head Sizes: Featuring detachable grinding head sizes of 15, 19, 28, and 35mm, this hand valve lapper set ensures versatility and adaptability for different cylinder sizes. 5、Precise Grinding: The double headed valve grinding tool allows for precise grinding of engine cylinder dust, offering a clean and efficient solution for maintenance and engine upkeep. Specification： Item Type: Valve Grinding Stick Set Material: Solid Wood + Rubber Application: Suitable for grinding most engine cylinder deposits. Removable Grinding Head Sizes: 15, 19, 28, 35mm Fitment: for any clean, flat surface of a mower, chainsaw, or small or large engine car or other vehicle with valve Package List： 2 x?Valve?Lapping?Stick