1. Sharp edge with guidance, large diameter design enhances tool stability and vibration resistance.

2. Spiral groove for upward chip removal, significantly reducing the risk of tool breakage.

3. Polished edge with high smoothness, finely ground edge for better brightness and reaming quality.

4. Made from high-quality tungsten steel material, high hardness and wear resistance, long service life.

5. Straight groove for downward chip removal, suitable for through-hole processing.

6. Chamfered handle for shock absorption and pressure reduction, easy to use, good compatibility, and non-slip.