Wilton 121 45S, Machinists-Feet Bench Vises-Swivel Base, 4-1/2-Inch Jaw Width, 7-1/2-Inch Jaw Opening, 4-Inch Throat Depth Hardened Steel Jaw, Replaceable Inserts Are Machine Serrated For Safe, Sure Grip Under Maximum Torque Extra Deep Throat - This Design Gives You More Working Room Where It Counts Enclosed Design Keeps Lubrication In And Contaminants Out For Smooth Operation