41/64 Inch SST+ Cobalt Prentice Drill Bit with 1/2 Inch Shank

Drill Large Holes in Stainless Without the Hassle

For welders and fabricators, drilling large holes in tough materials like stainless steel usually means a lot of prep work—center punching, stepping up drill sizes, and hoping the bit doesn't burn out. The Walter 41/64" SST+ Prentice Drill (SKU: 01M541) changes the game. This bit is built tough with a cobalt blend that resists the extreme heat generated when drilling hard metals, meaning you get more holes per bit and spend less time at the grinder sharpening tools.

One of the biggest frustrations in the shop is a large drill bit spinning inside the chuck when it bites into the metal. Walter solved this with a secure 1/2-inch shank featuring three flattened sides. This design locks into your drill's chuck jaws, delivering 100% of the torque to the cutting edge so you can power through the cut without stopping to retighten. Because the shank is reduced to 1/2-inch, you can use this 41/64-inch bit in your standard hand drill or magnetic drill without needing special adapters.

Accuracy is key when fitting up parts. The SST+ bit features a self-centering 135-degree split point that bites instantly on contact. You can drill on curved surfaces like pipe or tubing without the bit wandering off your mark. It eliminates the need for pre-drilling pilot holes in most applications, saving you valuable time on the job. Whether you are working with mild steel, aluminum, or heavy-gauge stainless, this is the reliable heavy-duty bit you need in your toolbox.