Tungsten Drill Bits Combination Set

•  Made of high speed M2 steel, each steel bit has a titanium nitride coat for anti-rust, added durability and prolong life-span.
• High thermal insulation performance,not easy to affinity with metal, anti-sticky, imitation powder, improve the surface quality of processed products;ideal for fast drilling in brick, concrete and stone.
• l Bit Set ideal for Commercial Home General Building /Engineering Using for the drilling of common materials such as steel, cast steel, cast iron, sintered metals, non-ferrous metals, plastics, and soft and hard wood.

Set of:

• 1 * 4mmx75mm
• 1 * 5mmx90mm
• 1 * 6mmx95mm
• 1 * 8mmx120mm
• 1 * 10mmx135mm