01D540 - Walter 4.00Mm Sst Drill Bit

Stop Burning Through Bits on Stainless Steel

Every welder knows the frustration of grabbing a drill bit, lining it up on a piece of stainless steel, and watching it smoke, squeal, and dull before it even breaks the surface. The Walter 4.00mm SST+ Drill Bit (01D540) is the solution to that headache. Designed with the serious fabricator in mind, this isn't your average hardware store bit. It is built with a heavy-duty cobalt blend that loves to eat through hard metals. If you are working on a project that demands precision and speed, you need a bit that bites instantly and keeps cutting hole after hole.

The secret to the SST+ performance lies in its ability to stay cool. Heat is the enemy of any cutting tool, especially when working with stainless steel which tends to work-harden if the bit rubs instead of cuts. Walter designed these bits with a special "High Flow" flute shape that pulls chips out of the hole incredibly fast. This keeps the cutting edge clear and cool. On top of that, the bronze-colored SST surface treatment acts like a shield, reducing friction so the bit slides through metal rather than grinding against it. This means you can drill faster with less pressure, saving your arm and your drill motor.

Whether you are drilling out rivets, prepping holes for tapping, or fabricating custom brackets, the 01D540 delivers professional results. It features a self-centering design that helps prevent walking, so you can drill exactly where you marked without needing a center punch every single time. It works perfectly on mild steel, aluminum, and is an absolute beast on stainless. Upgrade your toolbox with Walter SST+ bits and spend more time fabricating and less time sharpening or replacing burnt-out tools.