Unilock Riser Chucks have a working diameter of 80 mm. They are available on base plates or as stacking modules in heights of 75 and 100 mm. Base Plate Chucks have Ø 12 mm dowel pin holes that locate chucks on 40 and 50 mm grid patterns.
Base Chucks can also have clamping knobs attached for use in other Unilock chucks, or the stacking version can be used for elevation and clearance. All chucks open and close quickly with a single hex key.