DRILLFORCE 10 piece 1mm/ 1.5mm/ 2mm/ 2.5mm/ 3mm M35 HSS Cobalt Twist Drill bits 5%Cobalt Size for 304 Stainless Steel Iron Cast Sheet Metal Aluminium Alloy High Speed Steel HRC 65 Hard and Strong Work force

Features:-Material including 5% Co-High Speed Steel -135 Degree Split point tip starts drilling immediately with less force-Adopting for cast iron, sheet metal, steel plate, aluminum steel, specially for stainless steel 304 performance very well-With bright polished finished and 5% Co surface treatment-High precise grinding with sharp blade-Cobalt steel extends cutting edge life and maintains cutting lifetime afer resharpeningPackage: Package: 1mm * 10pcs1.5mm * 10pcs2mm * 10pcs2.5mm * 10pcs3mm *10 pcs103: Total 50pcs for One PackThese drill bits are made of M35 material, including 5% cobalt, high hardness, stable performance.Cobalt steel extends cutting edge life and maintains cutting life after resharpening.M35 material and contain 5% cobalt, which effectively improves its hardness and ensures stable performanceThere are 10 drill bit sizes for this hss drill bit set, and each pack has 10 identical drill bits, you can choose according to your needsTwist drill high speed steel bit has a high surface finish, which is very suitable for drilling stainless steel, cast iron, sheet metal, steel plate, aluminiumM35 cobalt twist drill uses a 135-degree bifurcated tip design, and starts drilling immediately with a small forceSharp and durable, which can be widely used for drilling stainless steel plates, automobile spring steel and die steelNoting: ±1-3mm tolerance