"Independent" means that each jaw moves independently. Such 4-jaw chucks are used for holding odd shaped pieces or where zero tolerance is required. This 4-jaw chuck has a semi-steel body and hardened reversible jaws. Requires a mounting plate. Note the mounting holes are through the front of the chuck. This is because each jaw moves independently and there is no scroll in the middle. Bore: 2 3/4"
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"Independent" means that each jaw moves independently. Such 4-jaw chucks are used for holding odd shaped pieces or where zero tolerance is required. This 4-jaw chuck has a semi-steel body and hardened reversible jaws. Requires a mounting plate. Note the mounting holes are through the front of the chuck. This is because each jaw moves independently and there is no scroll in the middle. Bore: 2 3/4"
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