For sale is a 15-3/4" lathe chuck 15-3/4" - dia; 3" width; 2-1/25" central hole; Holes for jaw are 4-1/4" x 1-3/8" Also in the pic. you can see smaller holes. There are 2-1/4 x 3/4" I have another chuck somewhat similar to this one, but with jaws. Look here: http://ef.chudov.com/e/400888231379