Vise Brands Athol/Starrett Model 523-1/2 Vise Details Manufacturer Athol/Starrett Model 523-1/2 Country of Origin USA Weight 34 pounds Jaw Width 3.5" Jaw Opening 4.625" Anvil? No Replaceable Jaws? No Pipe Jaws? No Base Type Swivel Swivel Jaw? No Screw Covered Quick Release? Yes Category Machinists Notes Patent Date Images (External Link)