4-jaw chucks are used for holding odd shaped pieces or where zero tolerance is required. each jaw moves independently. This 4-jaw chuck has a semi-steel body and hardened reversible jaws. Requires mounting plate. Note the mounting holes through the front of the chuck. This is because each jaw moves independently and there is no scroll in the middle. Through hole: 1"
1 sets of jaws, a wrench ,and mounting screws
Overall Dimension: 4" x 2-1/8"
1" Shaft hole
Max Jaw Opening 3"
Back Plate not included.