Steps for usage: 1. Grind the edge of the hole into a rough surface with a file or sandpaper, and the diameter of the rough surface should not be smaller than the patch; 2. Clean the polished surface; 3. Align the centre of the tire patch with the hole, buckle and press it firmly; 4. After leaving still for 5 minutes, put it in the outer tire and inflate the tire to complete the repair.
