Armstrong 78-434 4 in. Zinc-Plated Deep Throat Pattern C-Clamp

Forcing screw has roll formed acme threads for greater strength, smoother running, reduced thread damage, and producing more clamping force with less effort. Extra large anvil for greater gripping area, produced to insure flat surface for proper alignment with screw. Swivel pad completely encircles the ball joint providing permanent attachment as well as full swivel action.