This site contains affiliate links for which we may be compensated.
Grizzly Industrial H8012 Keyless Drill Chuck$119.82
This precision milled, Large Keyless Chuck with 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. Spanner wrench not included.