6", Wood, Hand Screw Clamp, Adjustable Jaws For A Strong Grip Or Delicate For Those Small Projects, Oiled Wooden Jaws Won't Damage Or Slip On Your Work Piece, Held Together By Cold-Drawn, Carbon-Steel Spindles & Swivel Nuts, Acme Thread For Quick Clamping, Metal Parts Are Treated To Resist Rust, Large Handles For Comfort & Torque, 6" Jaw Length, 3" Clamping Capacity, 3" Throat Depth,.37 Spindle Diameter.