Machine Vise Uni-Grip Fixed Base Jaw Width (In.) 4 in Jaw Opening (In.) 4 in Throat Depth (In.) 1 1/4 in Overall Length (In.) 11 Overall Height (In.) 2-1/2 Clamping Force (Lb.) 450 Jaw Deflection 0.010 in At 33 lb Jaw Plate 0.003 in Bed/Base 0.003 in Can Be Positioned Anywhere on the Machine Table Unigrip Mechanism Keeps the Overall Open Length of the Vise Irrespective of the Jaw Position Unlike Other Vises with a Tommy Bar