Walter SST+ #20 Cobalt Stub Drill Bit for Stainless Steel

The Welder's Choice for Tough Metals

For welders and fabricators, a broken drill bit isn't just an annoyance—it's a work stoppage. The Walter #20 SST Stub Drill is built to withstand the rigors of the welding shop. Whether you are drilling out spot welds, prepping rivet holes in sheet metal, or working on a stainless steel assembly, this bit delivers the toughness you need. The key is in the cobalt blend material, which is specifically formulated to cut through work-hardened metals that would dull ordinary bits in seconds.

The geometry of this bit is designed for efficiency. It features a 135° split point that bites into the metal the instant it touches the surface. This means you don't need to waste time with a center punch, and the bit won't wander across your workpiece, scratching the finish. This self-centering action is particularly valuable when drilling into round surfaces like tubing or pipe, a common task in welding fabrication.

Furthermore, the stub length profile offers a distinct mechanical advantage. Because the bit is shorter, it is far more rigid than a standard length bit. This rigidity translates to more torque transfer to the cutting edge and virtually eliminates the flexing that causes breakage. When you are leaning into a drill on a piece of structural steel or trying to get a clean hole in a tight space, the Walter SST Stub Drill gives you the confidence that your tool will perform, hole after hole. It is the ultimate solution for drilling sheet metal and non-ferrous metals with speed and precision.