| Descriptions: These drill bits are made of M35 material, includes 5% cobalt, high hardness, stable performance. Cobalt steel extends cutting edge life and maintains cutting life after resharpening Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron. Features: Made of M35 material, includes 5% cobalt, high hardness, stable performance.135-degree split-point tip starts drilling immediately with less force and eliminates walking across the work surface.Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron.With high surface finish, high grinding precision , the blade is sharp and durable in use. It is widely used in the drilling … | |