Grizzly H8012 3/4-Inch by JT3 Keyless Dril Length Chuck
This precision milled, Large Keyless Chuck has a 3/16" - 3/4" capacity and fits JT#3 tapers. A large diameter knurled body provides plenty of hand torque for tightening and if that's not enough, three 5/16" diameter holes are provided for use with a spanner wrench (not included). Overall size is 2-3/4" diameter x 5" long.
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