Kreg Bench Clamp Base System 3 1 2 in Kreg Clamps Spring Clamp Weathered Fiberwood These bright steel common nails Aged Bronze Hardware These bright steel common nails bring a crisp Specification Details Material Polyurethane Product Texture Smooth Weight 2 (76 mm) bench clamp and bench clamp base with bolt and knob Automaxx® auto adjust technology adjusts the clamp automatically to match material thickness Clamps materials up to 3 1 2 In (88 mm) thick 3 In (76 mm) reach Easy to regulate clamping pressure with a simple thumbscrew Extra large padded clamp spreads clamping pressure evenly Ergonomic padded grips prevent hand fatigue