CME 6" 4-Jaw Independent Lathe Chuck, Plain (Flat) Back, Reversible Jaws

Independent Reversible Jaws; Jaws are individually adjusted to achieve precise workholding for any application | Highly durable; Steel inner mechanisms are quench hardened to increase toughness | Plain back; Requires a fitted backing plate to mount to your lathe's spindle | 6 5/16" Body Diameter; 2 3/16" Through-Hole Diameter; 0.315" to 3.1496" Clamping Range; 1.9685" to 6.2992" External Clamping Range | 2.5591" Registration Diameter; 0.1969" Registration Depth; Mounting holes are positioned on a 3.7402" diameter circle