01M604 - 1-1/16 Inch HSS Cobalt Reduced Shank Drill Bit

Drill Large Holes with Confidence and Precision

For welders and fabricators, drilling large holes in the field often presents a challenge: you need the capacity of a drill press but only have a portable drill on hand. The Walter 01M604 SST+ 1-1/16" Prentice Drill Bit is the solution designed specifically for this scenario. It brings the legendary durability of Walter's SST+ line to large-diameter applications, allowing you to bore clean, precise 1-1/16 inch holes using your standard 1/2-inch chuck power tools. Whether you are retrofitting structural steel, installing piping, or fabricating custom brackets, this bit delivers the performance you need without the hassle of changing tools.

Stop the Slip, Start the Cut
One of the biggest frustrations with large reduced-shank bits is the tendency for the shank to spin inside the chuck when the going gets tough. Walter has solved this with a secure 3-flat shank design. These flats lock into your drill's jaws, ensuring that every ounce of power from your motor is transferred directly to the cutting edge. Combined with the 135-degree split point, which bites into the metal instantly without wandering, you get a drilling experience that is stable, accurate, and safe. You can say goodbye to the time-consuming step of center punching or drilling pilot holes—this bit is ready to work the moment it touches the metal.

Built for the Toughest Metals
Standard HSS bits often burn out quickly when faced with stainless steel or hardened alloys. The 01M604 is crafted with a special cobalt blend that resists heat and wear, significantly extending the life of the tool. The bronze surface treatment further aids in keeping the bit cool by reducing friction and helping chips slide out of the hole effortlessly. This means you can drill more holes per bit, reducing downtime for sharpening or replacement. From mild steel to aluminum and stainless, the Walter SST+ Prentice drill is the reliable workhorse your toolbox is missing.