IRWIN Tools VISE-GRIP Locking C-Clamp, Original, Swivel Pad Tip, 4-inch (100mm) (165); 1-5/8&rdquo; (41mm) Jaw Capacity Versatile wide-opening jaws clamp a variety of shapes. Guarded trigger provides quick release while helping prevent accidental release.Jaw Capacity of 1-5/8" / 41 mm Locking clamp is constructed of high-grade heat-treated alloy steel for maximum toughness and durability Swivel pads hold tapered work, awkward fabricating jobs, and delicate projects without damaging the work surface Adjust pressure and work fit with turn screw that stays adjusted for repetitive use