1/2 inch Cobalt Drill Bit for Metal and Hard Steel(2pcs),M35 High Speed Steel Twist Jobber Metal Drill Bits,with Index Storage Case - size: 1/2 in (2 pcs)

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About this item 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 Jobber Length: 1/2 inch cutting diameter, Jobber Length: 1/2 inch cutting diameter, 4 inch flute length, 6 inch overall length, 135 degree split point, rounded for Easy Fitting into Any Drill or Rotary Hammer 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 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 Overview Material: Cobalt Steel Cutting Diameter: 12.7 millimeters Finish Type: Gold Oxide Shank Type: Round Cutting Angle String: 135 degrees

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