POWERTEC 71016 Vacuum Base Vise Rubber vacuum base mounts securely on any smooth, non-porous surface Universal ball joint offers 360 degree rotation and 90 degree tilt in any direction for optimum maneuverability Rubber vise jaw caps ensure non-marring of work piece "V" groove steel jaws are replaceable: Die-cast steel parts for strength and durability Jaw width 2-3/4" and opens to 2-5/8"