- Combination round and square shank can be used with bit brace or hand drill
- Made of steel with graduated beam for adjusting to diameters from 5/8 in. to 6 in.
- Two independently adjustable blades cut inside and outside diameters at same time
- Safely usable only with variable-speed hand drill running at less than 100 rpm
- Diameter range: 5/8 in. to 6-1/2 in.