Irwin 73136 13 Piece High Speed Steel Drill Bit Set

• Revolutionary tip design stays sharper longer and drills up to 28 percent 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 best combination of strength, heat resistance, and wear resistance
• Comes in a metal index case

Set includes drill bit sizes: 1/16"; through 1/4"; in 1/64"; increments.