1. Cam-lock handle rigidity locks & quickly releases tool holder
2. Correct height of cutting edage is easily & accurately adjusted by special set screws
3. Tools can be reground without removal form tool holder setting remains unaltins unaltered
4. 40 different angles(every 9°)are conveniently selected from position dials with marker
5. Holders are interchangeable with most other brand 40 position tool post