Cobalt Step Drill Bit Set | 3-13mm Hex Shank | For Stainless Steel & Hard Metals

The M35 Hexagonal Spiral Step Drill Bit is engineered for superior durability and cutting speed in stainless steel and other hard metals. Its 3-13mm range and cobalt-containing M35 steel construction provide exceptional heat resistance and edge retention, delivering clean, burr-free holes with a single tool. Features and Benefits - M35 Cobalt-Containing Steel - Offers high heat and wear resistance, significantly extending tool life compared to standard HSS bits when drilling stainless steel. - Hexagonal 1/4" Shank - Provides a secure, non-slip grip in hand-held drills and drill chucks, preventing bit spin and ensuring maximum torque transfer. - Spiral Flute Design - Efficiently channels metal chips away from the cutting edge, reducing heat buildup and preventing clogging for smoother, faster drilling. - Step Drill Geometry (3-13mm) - Creates multiple hole sizes with one bit, eliminating the need for multiple drill bits and ensuring perfectly concentric, chamfered holes. - 135-Degree Split Point - Self-centering tip starts drilling immediately without walking, providing greater precision and control on curved or hard surfaces. Applications - Metal Fabrication and HVAC Work - Ideal for drilling clean holes in stainless steel sheet metal, aluminum, and copper for ducting, brackets, and assemblies. - Automotive and Machinery Repair - Perfect for enlarging existing holes or creating new mounting points in thin to medium-gauge metal panels and frames. - Plumbing and Electrical Installations - Efficiently creates precise holes for pipes, conduits, and fittings in various metal enclosures and junction boxes. - General DIY and Workshop Projects - A versatile, time-saving solution for any project requiring multiple, cleanly finished holes in metal.