- Combination round/square shank can be used with a bit brace or hand drill
- Made of steel, including graduated beam for adjusting diameters from 5/8 in. to 6-1/2 in.
- Two independently adjustable blades cut inside and outside diameters at the same time
- Only safe to use with a handheld variable-speed drill running at less than 100 rpm
- Included blades (#11B) are replaceable
- Diameter range: 5/8 to 6-1/2 in.
- #11B (two blades)