01U004 - Walter 1/4 Inch Variable Pitch Countersink 82 Degree M2 HSS

The Solution to Rough Countersinks and Burrs

Every welder and fabricator knows the frustration of trying to countersink a hole in stainless steel only to have the tool chatter, scream, and leave a rough, hexagonal-shaped seat. Not only does this look unprofessional, but it also prevents fasteners from seating flush. The Walter 1/4"-82 Degree VP Countersink is designed to solve exactly this problem. The "VP" stands for Variable Pitch, a smart design feature where the flutes are spaced unevenly. This simple but effective engineering trick stops the tool from bouncing harmonically in the hole, ensuring a smooth, round, and chatter-free cut every single time.

Durability is key in a fabrication shop, and this tool is built to last. Made from M2 High Speed Steel (HSS), it stands up to the heat and abuse of daily metalworking. Unlike cheaper carbon steel bits that dull the moment they touch a piece of 304 stainless, the Walter 01U004 maintains its edge, allowing you to get more holes done between sharpenings or replacements. It features a special surface treatment that helps chips slide off the tool rather than welding themselves to the cutting edge, keeping the tool cool and cutting freely.

This tool isn't just for making seats for screws; it is an excellent deburring tool. After drilling holes in plate or tubing, a quick touch with this countersink removes sharp burrs instantly, leaving a safe, clean edge. The 82-degree angle is the industry standard for most US bolts and screws, making it a go-to tool for general fabrication, assembly prep, and finishing work. Whether you are working on aluminum, mild steel, or stainless, this countersink gives you the control and finish quality you need to send your parts out the door looking top-notch.