Step Drill Bit for Metal, M35 HSS Cobalt Step Drill Bit (3-13mm, 11-Steps) with 6.35mm Hex Shank, Cone Drills Bits for Hard Metal, Stainless, Steel, Aluminium, Wood

• [Stepped Drill Bit] This step drill bit comes in 11 precise sizes (3-13 mm) and can replace 11 different drill bits, allowing you to easily drill or enlarge holes in stainless steel brackets, cast iron machine parts, copper busbars, and aluminum alloy frames. It is ideal for industrial maintenance, automotive repair, and electrical installations, saving up to 30% of time by eliminating the need for frequent drill bit changes.
• [Metal Drill Bits for Hard Steel] This cobalt drill bits is made of M35 cobalt high-speed steel (containing 5% cobalt), which is twice as hard as standard high-speed steel (66-69 HRC). It is specifically designed for materials such as stainless steel, copper, aluminum, and spring steel. The heat-treated alloy is wear-resistant, suitable for hardened steel plates, and ensures clean cuts on soft metals such as copper/aluminum plates. Compared to non-cobalt drill bits, it reduces wear by 50%.
• [Cobalt Drill Bits] This step drill bit features a 6.35mm hex shank that securely mounts on all standard electric drills, impact drills, and bench drills without slipping, even when machining hard metals like stainless steel or soft metals like aluminum at high speeds. It works perfectly with cordless drills, bench drills, and hand tools, making it ideal for professional workshops and DIY projects.
• [Step Drill Bit for Metal] The 118° X-shaped cutting edge features self-centering to eliminate drill bit drift, enabling precise drilling even on uneven surfaces such as stainless steel pipes or cast iron fittings without a guide hole. The spiral flute design effectively removes metal chips from copper, aluminum, and thin steel plates, preventing clogging and producing burr-free holes in half the time of conventional drill bits.
• [Step Drill Bit] Engineered for hard metals (stainless steel, cast iron, spring steel) and soft metals (copper, aluminum, brass), this step drill bit for metal handles thicknesses from 1mm (copper foil) to 5mm (stainless steel plate) with consistent precision. Perfect for metalworkers, electricians, and DIY enthusiasts tackling projects from stainless steel kitchen installations to aluminum sheet metal fabrication—no need for multiple tools.

Product size: 75.5 *12mm Material: M35,Cobalt,HSS Size Range: 3mm-13mm, 11 step Shank Type: 1/4"(6.35mm) Hex Shank for impact drills, hand drills, and bench drill presses Packaging includes: 1 PCS M35 Cobalt Step Drill Bit for Metal Features: it is able to drill or ream different holes on one drill tip with excellent speed and precision Introduce: 1. 1/4 inch (6.35 mm) Hex Shank: These step drills are compatible with a wide range of drilling tools, including bench drills, pressure drills, impact drills, and hand drills, expanding the versatility of your toolbox. 2. 11 Step Sizes: The 11-step flute design enables seamless, efficient drilling. Drill holes of various thicknesses without the need for multiple drill bits. 3. 118° X-Shaped Opening Design: The flute design allows for smooth, clean drilling with excellent chip removal. 4. These step drills are compatible with a wide range of drilling tools, including bench drills, pressure drills, impact drills, and hand drills, expanding the versatility of your toolbox. 5. This makes them suitable for both DIY enthusiasts and experienced craftsmen. In certain specific applications, due to their design advantages, they can also be used as metal taper drill bits.