1 Twist Drill Bit 13 19 25pcs 3 Edge Gun Drill Bit for Stainless Steel Metal Cobalt Coated M42 Hole Drilling Features: 1. Using M42 high speed steel, 8% high cobalt, more durable and shaper, easy to drill solid material, such as 304 stainless steel. 2. 3 edge cutter head and 135 degree split point design, make drilling easier, easy to chip, no slipping. 3. High heat treated hardness 68-70 HRC. 4. Can be used radial drill, bench drill or hand drill chuck for drilling operations. Specification: Type: Twist Drill Bit Material: High Speed Steel M42 Coated: Cobalt Coating 13pcs Set: 1.5/2/2.5/3/3.2/3.5/4/4.5/4.8 /5/5.5/6/6.5mm 19pcs Set: 1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0 /5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0mm 25pcs Set: 1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0 /5.5/6.0/6.5/7.0/7.5/8.0/8.5/9.0/9.5/10.0 /10.5/11.0/11.5/12.0/12.5/13.0mm Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Including: 1Set Twist Drill Bit 1