From the Manufacturer
This heavy duty woodworking vise has a front jaw that pivots 10-Degree to allow for clamping irregular shaped parts. The front jaw moves up to 9/16-Inch to act as a full length dog. The pivot jaw can be removed for wider clamping requirements. Mounting instructions are included.
This woodworkers vise includes a metal housing which fully encloses the screw, preventing sawdust and dirt from “gumming” the threads. Not only does this keep the threads clean, but it also increases the life of the vises rapid action release mechanism. Front jaw pivots 12 degrees to allow clamping of irregularly shaped objects and the entire front jaw can be “lifted” up and locked in place to serve as a full length dog. Jaw width is 4″ x 7″. Max. opening is 0″. 29 lb. Complete with mounting instructions. Vise shown with optional magnetic maple jaw sold separately.