Sinyeenglon 5/16 Cobalt Drill Bits for Metal and Hardened Steel (5Pcs)

Key features

• M35 Cobalt 5% Material: High cost, but hardness is up to 67, cut faster and has a long life, up to 12 times compared with the average HSS titanium coated bit
• Hardened Full Grinding Process: Increases wear resistance, sharp and durable, used for stainless steel, cast iron, hard sheet, flat bar, mild tube, zinc alloy, titanium, aluminum and hardened metal
• Wide Range Of Applications: This product can drilling through hard metals such as stainless steel, cast iron, zinc alloy etc., while the HSS titanium-plated version you usually see can only be used on soft materials such as wood and plastic
• Jobber Length: 5/16 inch cutting diameter, 3 inch flute length, 4-1/2 Inch overall length, 135 degree split point, rounded for Easy Fitting into Any Drill or Rotary Hammer
• Include: 5pcs of 5/16" cobalt drill bit are packed in a plastic case for easy storage and carrying
• Use Notices: Drill bit should be vertical to the workpiece when used; controling low speed from 200 to 1000 rpm; using cutting fluid will stay cool to make the bit last longer

Free shipping included. 30-day hassle-free returns.