M35 Cobalt Step Drill Bit (4–12 / 4–20 / 4–32 mm) – High-Speed Steel Hole Cutter for Metal & Stainless Steel

Make drilling larger holes faster and more efficient with this M35 cobalt step drill bit, engineered for precision cutting and long-lasting performance. Made from high-speed steel with cobalt, this tool is ideal for drilling and enlarging holes in hard metals, including stainless steel, aluminum, sheet metal, and more. Its stepped design lets you create multiple hole sizes with one bit, saving you time and reducing tool changes. Whether you’re a professional mechanic or a DIY enthusiast, this high-speed step drill bit gives you cleaner holes and smoother drilling in demanding materials. amazon.com+1

Structured Product Sheet

Key Features

• Crafted from M35 cobalt high-speed steel for enhanced hardness, heat resistance, and longer lifespan than standard HSS bits. Wikipedia

• Step drill design covers hole diameters from 4 mm to 32 mm, eliminating frequent bit changes. amazon.com

• Spiral groove or straight flute options available for efficient chip removal and smoother cutting action. Newegg.com

• Triangle or hex shank improves grip stability in standard drill chucks. amazon.com

• Ideal for drilling into stainless steel, carbon steel, aluminum, copper, and other metals. Walmart.com

Why Choose Our M35 Cobalt Step Drill Bit
Unlike conventional twist bits that require swapping out for each diameter, this step drill bit allows multiple hole sizes in a single tool, saving time and reducing setup complexity. The cobalt-enhanced HSS construction stays sharper longer and withstands higher temperatures, making it more reliable for hard metals than typical steel bits.

Perfect For
Metalworkers, mechanics, sheet metal fabricators, electricians, plumbers, HVAC technicians, and DIY enthusiasts working on projects that require precise hole cutting and enlarging in metal and metal-like materials.

How It Works / How to Use
Select the step on the bit that matches your desired hole diameter. Secure the bit in your drill chuck. Start drilling with steady pressure and appropriate speed — slower speeds are recommended for harder metals like stainless steel. Use coolant or cutting fluid to extend bit life and improve performance. amazon.com

Cut Precise Holes Without Swapping Bits

Add this versatile M35 cobalt step drill bit to your toolkit and enjoy faster hole cutting across a wide range of materials and sizes.