Irwin 20 C-Clamp, 1000 lb Clamping, 3-3/8 in Max Opening Size, 2-5/8 in D Throat, Steel Body

Constructed of high-grade heat-treated alloy steel for maximum toughness and durability. Guarded release trigger quickly unlocks and protects from accidental release. Turn screw to adjust pressure and fit work. Stays adjusted for repetitive use without damaging the work surface.