Walter SST+ Cobalt Jobber Drill Bit #7 (0.2010")

Stop Burning Bits on Stainless Steel

Every welder knows the frustration of grabbing a drill bit to prep a hole, only to have it scream, smoke, and dull the second it touches stainless steel. The Walter 01B507 SST+ Jobber Drill Bit is the solution to that headache. Built specifically for the tough demands of the metalworking industry, this #7 drill bit is formulated with a heavy-duty cobalt blend that thrives where standard bits fail. Whether you are drilling out broken bolts or prepping a piece of 304 stainless for a bracket, this bit bites in and keeps cutting long after others would have been thrown in the scrap bin.

One of the standout features for fabricators is the self-centering "Speed Tip." When you are working with a hand drill on a piece of pipe or a curved fender, standard bits tend to "walk" across the surface, scratching the finish and ruining your precision. The SST+ bit digs in exactly where you place it, without the need for a center punch or pilot hole. This saves you time and frustration, especially when working in awkward positions or on vertical surfaces. The #7 size (0.2010") is particularly important because it is the correct tap drill size for a 1/4"-20 thread—one of the most common fasteners in the industry. Having a reliable bit that creates a clean, true-to-size hole ensures your taps won't break later on.

Walter has also designed these bits to run cooler. The special bronze coating isn't just for looks; it helps the bit slide through the metal with less friction. Combined with the aggressive flute design that pulls chips out of the hole fast, you get a cleaner cut with less heat buildup. Less heat means the bit stays sharp longer, and you don't work-harden the material you are trying to drill. Whether you are in a fab shop, on a pipeline, or doing field maintenance, keeping a pack of Walter SST+ bits in your toolbox ensures you can get through the toughest metals without slowing down.