Walter 3-Step Reamer Drill Bit 5/16-Inch to 1-1/16-Inch

Fix Misaligned Holes Fast

Every welder knows the frustration of bolt holes that don't quite line up. Whether you are erecting structural steel or repairing heavy equipment, you need a tool that can open up a hole quickly without snagging or breaking your wrist. Enter the Walter 01W955 Multi-Step Reamer. This isn't your average hardware store step bit; it is a heavy-duty reamer designed to chew through steel plate up to 1/2-inch thick. It is built to take the abuse of the job site and keep on cutting.

The 01W955 features three massive steps taking you from 5/16-inch all the way up to 1-1/16-inch. This range covers the most common bolt sizes you will encounter in the field. Instead of carrying a pocketful of different twist drills or burning through cheap step bits that dull after one hole, this single tool handles the workload. The step geometry is aggressive enough to cut fast but designed to remain stable, preventing the chatter that ruins hole quality. It is perfect for enlarging plasma-cut holes that are slightly undersized or correcting fit-up issues during assembly.

Slippage is a major enemy when drilling large diameters, which is why Walter equipped this reamer with a 3-flat shank. This design locks into your drill chuck securely, ensuring that all the torque from your drill is transferred directly to the cutting edge. You can lean into the cut with confidence. It works exceptionally well on stainless steel, mild steel, and aluminum. If you are tired of fighting with dull bits and misaligned parts, throw this Walter reamer in your tool bag. It turns a headache of a job into a ten-second fix.

Additionally, the stepped design acts as a natural deburring tool. As you push through to the next size, the shoulder of the cutter cleans up the edge of the previous hole, saving you a secondary grinding step. Efficient, durable, and built for the trade—that is the Walter advantage.