Spptty Cobalt Coating Drill High Strength Convenient To Use Drill Bit Not Easy To Break Cobalt Coating High Wear Resistance For Perforating Various Materials

Feature: 1. Cobalt coating reduces friction and operating temperatures and extends its life. 2. No need for center punch not easy to break can be used for deburring chamfering and opening 3. High wear resistance high toughness and high strength flexibility 4. Available in seven styles for choice 5. Widely used for perforating various materials such as stainless steel tapping steel wood thin iron aluminum alloy moisture-proof board PVC board etc. Specification: Item Type: Step Drill Bit Material: High speed steel Standard(optional): 3-12 4-12 4-20 4-22 6-24 4-32 6-35 Package List: 1 x Drill Bit