Wilton 15981 406-Sep, 400-Sep Series C-Clamp, 0-Inch-6-1/16-Inch Jaw Opening, 4-1/8-Inch Throat Depth Drop-Forged, Regular-Duty With Extra Deep-Throat Grooved Anvil, Combined With A Deeply Serrated Perma-PadOn The Spindle, For Increased Gripping Power Spindles And Perma-Pads Are Copper Plated For Resistance