Perfectly concentric shape, wide flat spiral, precision machined from a special alloyed high carbon steel, inside hollow twist design, shank indentations for extension bar set screws, sharp finely honed cutting edges.
- 62 degree cutting angle reinforces cutting edge.
- Secondary relief angle removes material faster
- Oversized cutting head for easy removal from the workpiece
- Hardened tip for longer life
- Easy bit changes with Uni-Drive System TM
