High Quality Tungsten Carbide inner hole Drill bits with industrial coating
1. Manufacture with high quality solid carbide;
2. Cutting for following different hardness materials:
Less than HRC45 object;
HRC53-58 object;
Above HRC60 object.
3.Suitable for Mould steel, Cast Iron, Aluminum alloy, Copper, and Alloy steel processing,
Mainly for fixing point and chamfering before drilling the hole for the workpiece