Commonly used twist drills in the market are made of high speed steel (white) and cemented carbide (light black).
High speed steel has less hardness, but good toughness and low price, but it can not be used in high-speed cutting. It is generally used for materials with low hardness, such as aluminum alloy, low carbon steel, etc;

Cemented carbide has high hardness, less toughness and high price. It can be used in high-speed cutting. It is generally used for materials with high hardness, such as alloy steel and high carbon steel after annealing.

BOSENDA Full Grinding Twist Drill Bits/Metal Drill Bits with industrial standard, apply for stainless steel, cast iron, cast steel, I-beam, aluminum alloy and other metal materials. Featuring in high quality high speed tool steel, vacuum heat treatment, sharp and durable.

Both HSS and cemented carbide materials, can be used for stainless steel, iron sheet, angle steel, copper and aluminum and other metals. Its completely grind,with sharp blade, and wear high resistance and it has a longer service life. Straight shank is suitable for electric hand drill and bench vice.

Twist drill bits of different HSS materials and from the hard alloy materials can be used for different metal materials with their different service lives.The Cemented carbide material drill bits has high hardness, high strength, high wear resistance and corrosion resistance, excellent performance, stable and reliable quality.

We choose the most suitable twist drill bits for you according to your drilling objects,we provides the most professional products.In the past 10 years, we have shipped our drill bits to almost all the continents which includes many countries across the world, our quality is always in a core of our business dealing and we will always stress emphasis on quality control and the after sale service in order to stay competitive in the field.

BOSENDA Twist Drill Bits provides a complete specifications,satisfies the drilling of all kinds of metal materials.