"VISE HAS AN EXTENDED ANVIL, LUBRICATION POINTS FOR MAINTENANCE AND A SWIVEL BASE; REINFORCED CANTILEVER SUPPORT TO ASSURE RESISTANCE AT MAX OPENING; CAPACITY RANGE FROM 3.5 TON TO 9 TON AT MAX OPENING; HEAVY DUTY CAST IRON CONSTRUCTION ON THE INTERCHANGEABLE JAWS WHICH ALSO HAVE A DIAMOND GROUND FOR BETTER GRIP; ROLLED, ROUND THREAD SPINDLE; 6"" JAW WIDTH"