Product information:
Material: high speed steel
Style A: a set of hardened drill bits,
Style B: a set of twist drills
Shank diameter: 2.35MM
Uses: amber honey cockles, turquoise wood, wenwan olives, punching, carving, etc.
Features: It is made of hard steel by milling and forming, with high hardness and stable operation. The drill body is treated with yellowing. It has higher wear resistance and lower friction coefficient.
Packing list:
a set of quenched drill bits/a set of twist drills *1
