Features Improve Work Efficiency: Twist drill bit set has a sharp tip of 135 degrees. At the beginning of the beginning, use less strength to drill with less strength and eliminate "walking" on the entire work surface. Highly Grinding Accuracy: High -speed steel HSS twist drills have high surface smoothness and high grinding accuracy. The blade is sharp and durable in use. High Hardness And Stability: M35 cobalt drill bit sets are made of HSS CO/M35 materials, including 5 % cobalt, which has high hardness and stability performance, and long use time. Wide Application: Drilling sets are widely used for stainless steel plates, car spring steel and mold steel, cobalt steel materials can extend the cutting -edge life, can be used for a long time, more durable. Drilling: Twist drills kits are ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, corner iron and other materials. Features: 1.Made of M35 material, includes 5% cobalt, high hardness, stable performance. 2.135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface. 3.Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron. 4.With high surface finish, high grinding precision , the blade is sharp and durable in use. 5.It is widely used in the drilling of stainless steel plate, automobile spring steel and die steel 6.Cobalt steel extends cutting edge life and maintains cutting life after resharpening    Specifications: Material: HSS CO/M35 Drill bit size(Optional):1.0, 1.5mm, 2mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 5mm Quantity:10 Specification(mm) Working length Total length Weight(g) Package included: 10 x  M35 Cobalt Drill Bits Package List