Vise Brands Desmond Stephens/Simplex Model 41-SJ Vise Details Manufacturer Desmond Stephens/Simplex Model 41-SJ Country of Origin USA Weight 52 pounds Jaw Width 4" Jaw Opening 6.5" Anvil? No Replaceable Jaws? Pipe Jaws? No Base Type Swivel Swivel Jaw? Yes Screw Covered Quick Release? No Category Machinists Notes Patent Date Images (External Link)