Sturdy, all-aluminum construction Thick protective pads for non-marring surfaces Hardened drill guide Works on stiles from 1-1/2 inch to 2 inch Jaw width is 2 inches Minimum opening is 2 inches Maximum opening is 4-7/16 inch Color/Finish Family: Blue Type: C-clamp Throat Depth (Inches): 1.25 Clamping Force (lbs.): 450 Material: Aluminum Maximum Jaw Opening: 4-in Package Quantity: 2 Warranty: 3-year limited CA Residents: Prop 65 Warning(s): Yes UNSPSC: 27112100