Vise Brands Bonney Model 4 Vise Details Manufacturer Bonney Model 4 Country of Origin USA Weight 5 pounds Jaw Width 2.75" Jaw Opening " Anvil? Yes Replaceable Jaws? No Pipe Jaws? No Base Type Clamp Swivel Jaw? No Screw Exposed Quick Release? No Category Clamp Notes Patent Date Images (External Link)