Walter SST+ Heavy Duty Cobalt Drill Bit, Wire Gauge #21

Reliable Drilling for the Toughest Metals

When you are in the middle of a fabrication project, the last thing you need is a drill bit that burns out, snaps, or wanders across your workpiece. The Walter SST+ Jobber Drill Bit (Size #21) is built to solve these common shop headaches. Designed specifically for the welder and fabricator who works with a variety of metals, this bit shines where others fail—especially on stainless steel. The secret lies in its heavy-duty cobalt blend construction. This material composition allows the bit to withstand the high heat generated when drilling hard metals, ensuring that the cutting edges stay sharp hole after hole.

Time is money in any welding shop, and the Walter SST+ is engineered for speed. The unique "Speed Tip" design allows you to place the bit exactly where you need it and start drilling immediately. There is no need to waste time grabbing a center punch or worrying about the bit skating across a polished surface. It bites instantly and cuts aggressively. This precision is crucial when preparing holes for rivets, tapping, or precise fit-ups where tolerances matter.

Durability is further enhanced by the bit's smart geometry. The "High Flow" flutes act like a conveyor belt for debris, ejecting metal chips quickly so they don't clog the hole or overheat the bit. The body of the bit is also slightly tapered towards the back, which prevents it from getting stuck or binding when you are drilling through thick plate or tubing. Topped off with a bronze surface treatment that helps the bit run cooler and smoother, the Walter 01B521 is a workhorse tool.

Stop struggling with dull, inferior bits that slow down your production. Upgrade to the Walter SST+ series and experience the difference that premium geometry and materials make. Whether you are drilling mild steel frames, aluminum components, or stainless steel tanks, this #21 wire gauge bit provides the reliability and performance you need to get the job done right the first time.