Vise Brands Desmond Stephens/Simplex Model 31P Vise Details Manufacturer Desmond Stephens/Simplex Model 31P Country of Origin USA Weight 31 pounds Jaw Width 3.25" Jaw Opening 5" Anvil? Replaceable Jaws? Pipe Jaws? No Base Type Stationary Swivel Jaw? No Screw Covered Quick Release? No Category Machinists Notes Patent Date Images (External Link)