- Woodworking countersink– made of alloy materials that hardness, and sturdy without burr.
- Drill bit– made of alloy materials that hardness, sharp and sturdy without burr.
- Tools– centerless grinding technology, handle diameter smooth stiffness.
- Self tapping screw– easy to grasp and use, safe and reliable.
- Countersunk hole taper– sharp tungsten steel blade, fast drilling, cutting more smoothly.