HUHAO Electric Hammer Drill Bit, Cross Impact Drill Bit, Tungsten Steel Alloy Wall-Piercing Hole Drilling, Concrete-Specific Round Shank Square Shank Rotary Head

1. Ensure the drill is securely fixed and perpendicular to the surface

2. Wait a moment after penetrating the surface before drilling further

3. Stop working if any abnormalities occur during operation

4. Use water or coolant during drilling to extend the drill bit's lifespan

5. Drill bits are consumables and are not covered by warranty

All dimensions are manually measured and may have slight errors. Please refer to the actual product for accuracy.