49/64 Inch Cobalt Prentice Drill Bit with 1/2 Inch Shank

Heavy-Duty 49/64" Drill Bit for Stainless and Steel

When you are out in the field or in the shop, you need a drill bit that bites hard and doesn't quit. The Walter 49/64" SST+ Prentice Drill Bit is built for welders and fabricators who need to drill large holes without the hassle. If you have ever struggled with a large bit spinning in your chuck or dulling halfway through a piece of stainless, this is the solution you have been looking for. Made with a tough cobalt blend, this bit is designed to withstand the heat and stress of drilling through hard metals, ensuring you get more holes per bit and spend less time sharpening or replacing tools.

One of the biggest time-savers with this bit is its unique point geometry. The 135° split point allows you to start drilling immediately on contact—no wandering, no skating, and best of all, no need to waste time drilling a pilot hole first. Just line it up and pull the trigger. The exclusive Bronze SST surface treatment helps the bit cut smoothly and clears chips fast, keeping the heat down and your work moving forward. It is perfect for drilling round surfaces, pipes, or flat plate.

This bit is designed to fit the tools you already own. Even though it cuts a massive 49/64-inch hole, it features a reduced 1/2-inch shank, making it compatible with standard 1/2-inch drill chucks found on most heavy-duty portable drills and drill presses. Plus, the shank isn't round—it has three flat sides ground into it. This "Secure-Fit" design means the chuck jaws grab onto flat metal, preventing the bit from slipping under load. Whether you are working on mild steel, aluminum, or stainless steel, the Walter 01M549 gives you the power and reliability to get the job done right the first time.