Jaw Width: 4.5", Max Jaw Opening: 4.5", Throat Depth: 3.5", Pipe Jaws Capacity: φ 1/4"-3", Net Weight: 39.6 lbs Made of ductile iron (PSI 60,000) to withstand high pressure, 2X stronger than gray cast iron, ensuring reliability for heavy-duty tasks Robust Anvil: The 2.7" x 2.9" large anvil is specially designed to withstand heavy use during material forming and shaping Machined Steel Jaws: Equipped with 2 sets of replaceable serrated jaws, offering a robust clamping force of 8,800 lbs (40 kN) The precision-machined slide bar prevents front jaw movement. The longer spindle nut guarantees smooth operation and a stronger straight-line pull The enclosed design efficiently retains lubrication and prevents the intrusion of water, dirt, and rust, ensuring a lifetime of smooth performance Easily mounted (installation hardware included), mounting holes: 9/16" (x4). Solid lockdown with dual-locking nuts The Forward 1745A 4.5-inch Industrial Grade Bench Vise is a top-notch tool with several outstanding features. It boasts a 360-degree swivel base for enhanced flexibility and a large anvil for various tasks. The vise is made of durable ductile iron, providing exceptional strength and reliability. Equipped with replaceable steel pipe jaws, it offers a minimum clamping force of 8,800 lbs, ensuring a super secure grip. The enclosed structure keeps the vise lubricated and protected from dirt and rust. With its high-quality construction and versatile design, this bench vise is ideal for both industrial and workshop DIY use.