Gross Stabil 2800RP-6.5 Heavy Metal Working (up to 2800-Pound) Sliding F Clamp 4 5" Throat Depth 6 5" Nominal Opening 1-3/16X19/32" galvanized steel bar, hardened and spring-tempered Replaceable Two part Pad and spindel T handle with Black oxide spindle, With Hex for extra tighting with a hand wrench