4-3 Jaws, 30" Diam, Self Centering Manual Lathe Chuck, Dimensions 30" diameter x 12.5" tall x 4-5/8" ID hole, rear lathe mounting plate 6-3/4" center to center mounting studs, 13" center to center mounting holes. Brand Whiton Machine CO USA made. All 4 jaws self center, in good working condition, opens and closes jaws smooth, surface rust. This came from a foundry where it was in use currently. Weights 1068 lbs. local pick up or shipping to the lower 48 states.