Irwin 73320 Jobber Drill Bit, 5/16 in Dia, 4-1/2 in OAL, Spiral Flute, 5/16 in Dia Shank, 3-Flat Shank

High-speed steel features a black body and gold flute with Turbomax tip for burr-free holes. Exact centering; no walking on straight and curved surfaces. Three flatted shank on 3/16 in and above for better chuck grip. Jobbers length.

• High-performance metal drilling for portable drill users, works well on curved surfaces
• High-performance metal drilling for portable drill users, works well on curved surfaces
• Revolutionary tip design stays sharper longer and drills up to 10X faster than other leading drill bits
• Self-centering TURBOMAX tip for clean entry and fast starts, stays sharp longer
• Three-flatted shank on 3/16 in and above for better chuck grip