Unibit Hole-Enlarging Step Drills - 54-331-4
- UNIBIT Step Drills have an exclusive single radial concave flute
- This design allows the drilling of perfectly round holes in thin materials quickly and with less effort
- Each bit is constructed of industrial grade high speed molybdenum steel,and is heat treated to a hardness of between 61 and 63 on the Rockwell scale
- This assures maximum strength and long life
- Shank size: 1/2"
- Step thick: 1/8"
Unibit Hole-Enlarging Step Drill
