Irwin - Unibit 1/4 to 1-3/8 in. X 6 in. L High Speed Steel Step Drill Bit Hex Shank 1 pc

The IRWIN Unibit Step Drill No. 5, 1/4-Inch to 1-3/8-Inch, is an ideal bit for cutting precise holes in thin materials such as copper, plexiglass, laminates, wood and mild steel. It has a SpeedPoint tip that starts cutting quickly and a single flute design that produces a perfectly round hole every time.