Titanium-coated Drill Bits: Made of high speed M2 steel, each steel bit has a titanium nitride coat for anti-rust, added durability and prolong life-span. High Carbide-tipped Masonry Drill Bits: 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.
Suitable: HSS Drill 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.
