Irwin 73628ZR Jobber Drill Bit, 7/16 in Dia, 5-1/2 in OAL, Spiral Flute, 7/16 in Dia Shank, Reduced Shank

High-speed steel features a black body and gold flute Turbomax tip for burr-free holes; 3/8 in reduced shank fits all 3/8 in drills. Exact centering; no walking on straight and curved surfaces. A 3-flatted shank on 3/16 in and above for better chuck grip. Jobber length.

• Revolutionary tip design stays sharper longer and drills up to 10X faster than other leading drill bits
• Revolutionary tip design stays sharper longer and drills up to 10X faster than other leading drill bits
• Three-flatted shank design provides better chuck grip and reduces slippage
• Ideal for use in keyless chucks
• Bit is constructed of M-2 high-speed steel for the excellent combination of strength, heat resistance and wear resistance
• 3/8 in reduced shank fits all 3/8 in drills