01M555 - Walter SST+ 55/64" Cobalt Prentice Drill Bit with 1/2" Shank

Precision Drilling for Fabricators: Walter 55/64" SST+

For professional welders and fabricators, the ability to drill clean, accurate holes in tough materials is just as important as the weld itself. The Walter 55/64" SST+ Prentice Drill (SKU: 01M555) is the ultimate solution for drilling large holes without the need for heavy stationary machinery. This bit is specifically designed with a reduced 1/2-inch shank, making it compatible with the heavy-duty portable drills and mag drills you already use in the shop or out in the field. It allows you to tackle 55/64-inch holes in frames, plates, and pipes with ease.

What sets the SST+ line apart is its aggressive performance on hard metals. If you frequently work with stainless steel, you know how easily standard bits can burn up or work-harden the material. Walter solves this with a premium cobalt blend construction that maintains hardness at high temperatures. Combined with a unique bronze surface treatment, this bit cuts cooler and faster, ejecting chips efficiently to protect both the tool and your workpiece. The extra-hard tips are designed for longevity, offering extended usage intervals before resharpening is required.

Accuracy is built into the geometry of the bit. The exclusive self-centering point allows you to start drilling exactly where you marked, without the bit wandering across the surface. This means you can skip the pilot hole step, saving valuable time on every job. Additionally, the 'Secure-Grip' shank features three ground flats that prevent the bit from slipping in the chuck, ensuring that all the power of your drill is transferred to the cut. From truck frame modifications to structural steel erection, the Walter 01M555 is the reliable choice for heavy-metal drilling.