Feature: 1. Sturdy Material: Made of high strength tungsten steel material, the bowl shaped grinding head is wear resistant and robust, resistant to erosion and oxidation, providing a longer lifespan. 2. Efficient Grinding: The tungsten steel grinding head is used to roughen the surfaces of the tire for better adhesion, saving time and effort with quick polishing using a drill. 3. Increased Adhesion: The wooden handle and metal buffing wheel roller help remove air underneath the tire patch, enhancing adhesion and sealing performance for your tire. 4. Complete Tool Set: The kit includes tungsten steel grinding heads, low speed hex rod and high speed circular rod, wooden handle buffing wheel roller, and tire scraping cutter, meeting various repair needs. 5. Versatile Application: The tire repair patch kit is suitable for tires of cars, trucks, motorcycles, bikes, electric bikes, ATV, UTV, widely used in vehicle maintenance. Specification: Item Type: Tire Repair Tool Kit Grinding Head Material: Tungsten Steel Grinding Head Diameter: Approx. 25mm / 0.98in, 42mm / 1.65in, 55mm / 2.17in Low Speed Grinding Rod Diameter: Approx. 11mm / 0.43in High Speed Grinding Rod Diameter: Approx. 6mm / 0.24in Grinding Rod Thread Diameter: Approx. 8mm / 0.31in Buffing Wheel Width: Approx. 6mm / 0.24in Scraping Cutter Width: Approx. 74mm / 2.91in. Package List: 1 x Wooden Handle Buffing Wheel Roller 1 x Scraping Cutter1 x Low Speed Grinding Rod1 x High Speed Grinding Rod1 x 25mm Bowl Shaped Grinding Head1 x 42mm Bowl Shaped Grinding Head1 x 55mm Bowl Shaped Grinding Head