Fangrui Product Details [wear- Flexible]--tire Patch Roller Is Made Of High-quality Alloy Steel And Plastic, With Strong Wear Resistance, Sturdy And Anti-collision. Exquisite Bearing Link Technology With Non-slip Handle, Not Easy To Fall Off, And Labor-saving. [effective Grinding]--tire Repair Grinding Head Is Made From High-quality Tungsten Steel, And Equipped With A Low-speed Hexagonal Bar. The Hollow Umbrella Can Exclude The Air When Repairing The Tire, Maintaining A Sealed State. The Head Is A Rough Concave And Convex , Very Suitable For Grinding Tires, Not Easy To Wear, Efficient And Fast, And Can Long-term Use. [good Sealing]--car Tire Patches Are Made Of Natural Rubber, With Good Adhesion And Strong Sealing. The Thickened Rubber Layer Is More To Friction. The Inner Scraper Is Used To Scrape Off Dirt On The Tire To Help Quickly Repair The Tire. [easy To Use]--remove The Tire And Clean It, Quickly Polish The Tire Worn Areas With The Tire Repair Buffing Wheel, Then Evenly Apply Glue And Fill The Tire Repair Patch Plug, Rol