1. When cutting with a glass cutter, apply evenly and vigorously, otherwise it will affect the integrity of the disconnection. 2. When cutting, please use steel rulers, tiles and other auxiliary linear tools to ensure that the cutting is straight. 3. When using the opener, four foot pads should be placed on the front of the tile, and one foot pad should be placed on the back of the tile. 4. As glass cutters are sharp, please wear gloves, goggles, etc. when working with glass cutters to ensure safety.