The bit removes most of the material, and the chisel squares up the sides, allowing you to cut precise 1/4" mortises for mortise-and-tenon joints. Fits the Jet Benchtop Mortising Machine (81421, sold separately).NOTE: Use with Mortise machines and drill presses with a mortising attachment.
- Shank Length: 1-1/2''
- Chisel Length (including shank): 5-1/8''
- Bit Length: 8-1/8''
- Cutting Length: 2-1/2''