Cobalt Coating Step Drill Bit Triangular Shank Step Drill Bit Set Durable Hole Reamer Counterbore

Label:Yes [No Center Punch Needed] No need for a center punch, not prone to breaking, and suitable for deburring, chamfering, and hole opening. [Low Friction Coating] Cobalt coating reduces friction and working temperatures, helping extend the service life of the drill bit. [Strong Toughness & Wear Performance] Delivers reliable wear performance, high toughness, and high strength for flexible use across various materials. [Wide Material Compatibility] Widely used for perforating materials such as stainless steel, tapping steel, wood, thin iron, aluminum alloy, damp proof board, PVC board, and more. [Durable HSS Build] Made of high speed steel, providing solid durability and a long service life.

Item Type: Step Drill Bit Color: Multicolor Shank Type:Triangle Material: M35 High Speed steel Standard(optional): 4-12(5 steps ), 4-12(9 steps), 4-20, 4-32 shank diameter: 6mm:4-12(5 steps ), 4-12(9 steps) 8mm:4-20 10mm: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.