#30 Locking C-ClampWide-opening jaws provide greater versatility in clamping a variety of shapes. Turn screw to adjust pressure and fit work. Stays adjusted for repetitive use. Constructed of high-grade heat-treated alloy steel for maximum toughness and durability. Guarded release trigger quickly unlocks and protects from accidental release. Jaw Opening: 0 in [Min], 4 1/2 in [Max]; Material: Alloy Steel; Mechanism: Adjustable Mechanical Locking; Overall Length: 9 in; Packing Type: Carded; Throat Depth: 4 3/4 in; Weight: 0.91 lb.