01E121 - Walter SST+ Quick Shank Drill Bit Set 1/16-3/8 Inch

Premium Drilling Performance with Walter SST+ Technology

The Walter 01E121 SST+ Drill Bit Kit is a comprehensive solution for industrial drilling applications, offering a versatile range of sizes from 1/16-inch to 3/8-inch. Designed for the professional machinist and fabricator, this kit features Walter's renowned SST+ (Super Speed Tip) geometry. The bits are manufactured from a proprietary blend of High Speed Steel (HSS) and Cobalt, which significantly enhances heat resistance and wear life compared to standard black oxide or titanium-coated bits. This metallurgical composition makes them exceptionally capable when drilling through tough materials like stainless steel, structural steel, and aluminum alloys.

A standout feature of this series is the exclusive Quick Shank design. On larger sizes within the kit, the shanks are engineered with three precision-ground flats. This design integrates seamlessly with standard three-jaw keyless and keyed chucks, providing a positive lock that completely eliminates bit rotation or "spinning" under high-torque loads. This ensures maximum power transmission from the power tool to the cutting edge, improving efficiency and protecting the drill chuck from damage caused by slippage.

The drill bits utilize a 135-degree split point geometry. Unlike standard 118-degree points, the split point is self-centering, meaning it begins cutting immediately upon contact with the workpiece. This eliminates the need for pre-punching or pilot holes and prevents the bit from "walking" across the surface, ensuring precise hole placement every time. The heavy-duty web construction adds rigidity to the bit, reducing the risk of snapping during breakthrough or when drilling at slight angles. Packaged in a rugged, impact-resistant index case, the 01E121 kit keeps your tools organized and protected in harsh shop environments.