Meet your new go-to hole-drilling hero: the 4–12 mm HSS Step Drill Bit, crafted from premium high-speed steel, engineered for precision and versatility. Ideal for metalworkers, electricians, plumbers, and DIY enthusiasts—this single-piece tool lets you drill five hole sizes (4, 6, 8, 10 & 12 mm) with flat, burr-free results.
Thanks to its hardened HSS construction, this step bit maintains sharp performance even when cutting stainless steel, aluminum, brass, copper, plastics, and wood—thanks to excellent hardness, wear resistance, and heat tolerance . No need to change bits—just step up your hole size seamlessly, saving time and effort A single cutting edge design ensures round, accurate holes every time, without walking or wobbling. The black oxide finish—or optional titanium coating—delivers corrosion protection and smooth drilling with cutting fluids Laser-etched markings make hole size identification easy, so you know exactly where you are drilling
Designed for modern power tools, the hexagonal (1/4″) shank fits securely in rotary drills and impact drivers—no slipping, no adapters needed . The Speed-Start tip centers instantly for faster hole initiation—great for flat sheet surfaces
Whether installing electrical conduit, mounting hardware, or enlarging holes in panels, this step drill is crafted for smooth results and precise depth control. Its stepped design also countersinks and deburrs in one go—detachable dies elsewhere just can’t match that efficiency
In practice, use it at moderate speeds (250–400 RPM) with light pressure and some cutting fluid for optimal life and performance . Lightweight yet robust, it’s a must-have for professionals and hobbyists alike.
