Multifunctional Step Drill Bit Cobalt Coating Hole Cutter Durable Drilling Tool Cutting

Label:Yes [Wide Material Compatibility] Suitable for perforating many materials such as stainless steel, tapping steel, wood, thin iron, aluminum alloy, damp proof board, PVC board, and more. [High Toughness & Strength] Delivers high toughness, high strength, and strong wear performance for flexible use across various materials. [Reduced Friction & Heat] Cobalt coating reduces friction and working temperatures, helping extend the service life of the drill bit. [Seven Styles Available] Comes in seven different styles for you to choose from, meeting a variety of project needs. [No Center Punch Needed] No need for a center punch, not prone to breaking, and suitable for deburring, chamfering, and hole opening.

Item Type: Step Drill Bit Material: High speed steel Color: Multicolor Standard(optional): 3-12mm(0.12-0.47in), 4-12mm(0.16-0.47in), 4-20mm(0.16-0.79in) Handle diameter :6.35mm(0.25in) Package List: 1 x Drill Bit Note: 1. Hand drills and table drills can be used for opening stainless steel, plates can be opened within 1mm(0.04in) by hand drill, and 2-3mm(0.08-0.12in) 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.