Wilton Tradesman 1780XC Vise, 8" Jaw Width, 6-3/4" Jaw Opening, 4-3/4" Throat DepthThe Tradesman XC vise is designed to handle the most demanding clamping applications under the most extreme environmental conditions. Unlike most vises that have a fixed center nut, all Tradesman round channel vises use a nut anchored at the rear which provides straight line pull and even pressure resulting in greater durability. The round channel design also allows for a completely enclosed spindle and nut assembly keeping debris out and lubrication