EOTVIA Step Drill Bit Cobalt Coating Hole Drill Bit For PVC Board For Tapping Steel For Wood

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. Made of high speed steel material high hardness and long service life 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): 4-12(5 steps) 4-12(9 steps) 4-20 4-32 Package List: 1 x Step Drill Bit Note: 1. Hand drills and table drills can be used for opening stainless steel plates can be opened within 1mm by hand drill and 2-3mm plates can be opened with table drills. 2. The speed of the stainless steel opening can not be fast a few hundred turns can be 3. It is best to use water injection or cutting fluid for cooling during processing which can effectively extend the life of the drill