01E239 - Walter SST+ 29-Piece Hex Shank Stub Drill Bit Set

Industrial Grade Drilling Precision

The Walter SST+ Stub Drill Bit Set (01E239) represents a premium solution for industrial drilling applications requiring both speed and extreme durability. This 29-piece set is engineered with Walter's proprietary SST+ material, a high-speed steel formulation enriched with a cobalt blend. This composition significantly enhances heat resistance and hardness, making these bits the superior choice for drilling through tough materials like stainless steel, heavy-gauge steel, and aluminum without dulling prematurely.

Engineered for Rigidity and Control

Unlike standard jobber-length bits, this set features a stub length (screw machine) profile. The shorter flute and overall length greatly increase the torsional strength of the bit, virtually eliminating the flexing and snapping common with longer bits under heavy load. This rigidity ensures precise, true-to-size holes and allows for higher feed pressures.

Quick-Change Efficiency

Designed for modern fabrication environments, each bit in this set is equipped with a 1/4" hex shank. This feature allows for instant compatibility with impact drivers and quick-change chucks, reducing downtime during tool changes. The positive drive of the hex shank also prevents the bit from slipping in the chuck, ensuring maximum torque transfer.

Advanced Geometry

Each bit features a 135° split point geometry. This self-centering design bites into the material immediately upon contact, eliminating the need for center punching and preventing the bit from "walking" across the workpiece surface. The set is housed in a rugged metal index box, keeping your tools organized and protected in harsh shop environments.