2pcs Cobalt Drill Bits Straight Shank 8mm Drill Bit High-Speed Steel Twist Drills Bits for Copper Stainless Steel Alloy Metal

Product Name: Drill IndexColor: BlackMaterial: High Speed SteelProduct Size: 8mmProduct List: 2 Pcs Cobalt Drill Bits for Hardened Steel

• Superior Materials and Coatings: These 8mm brad point drill bits are made of high-speed steel (HSS), offering high hardness and durability. The black and gold color scheme features a titanium nitride coating, enabling the drill bits to withstand harsh drilling environments without chipping or premature breakage
• Precise Specifications: Each mm drill bit set is designed for precision, with a cutting diameter of 8mm (0.31 inches) and an 8mm straight shank design for secure clamping in a standard drill chuck. The cutting edge length is 70mm (2.95 inches), and the overall length is 110mm (4.6 inches), achieving a good balance between effective range and maneuverability. The straight shank design ensures a secure clamping position and minimizes slippage
• Efficient Design and Performance: Sharp helical flutes and a 135-degree angle enable fast, smooth cutting and efficient chip removal. This design reduces friction and heat buildup during drilling, resulting in cooler, faster operation. Metric drill bit set is particularly effective at preventing chip clogging in thicker materials, saving you time and effort
• Wide Range of Applications: These high-speed steel twist drill bits are suitable for a variety of DIY and professional tasks. They perform exceptionally well on low to medium hardness metals, including stainless steel, iron, copper, brass, and aluminum alloys. Furthermore, they are also effective on non-metallic materials such as plastics and wood
• Durable Construction and Service Life: The high-speed steel construction is robust and durable, offering excellent wear resistance. The helical flute design and large chip clearance facilitate smooth chip removal, maintaining drilling efficiency and protecting the drill bit. These cobalt drill bits are suitable for general drilling applications, especially for hard metals such as cast iron and stainless steel (hardness below HRC38°)