The kit will increase the maximum holding capacity of the vise jaws from 2-1/2 to 3” So now you can notch in to 3" tubing! This optional accessory kit will increase the maximum usable size hole saw to 4”. Now smaller tubing can be coped to match larger sizes upwards to 4”. The SYNC180 is easily converted by simply installing the shims between the jaws and base plate. Bolts are included.
http://www.syncnotcher.com/liftkit.html
