F-Clamps and C-Clamps are essential tools designed for securing materials during woodworking, metalworking, and other heavy-duty tasks, each offering distinct features tailored to specific needs. C-Clamps boast a rugged, heavy-duty drop-forged steel frame with tough-hardened steel spindles, featuring a new design for maximum strength and a lacquered finish for durability. They include steel swivel pads that adjust freely for even pressure distribution, a precision-cut single-lead Acme thread for smooth operation, and copper-plated spindles for spatter protection, requiring no greasing due to dry lubrication, with added extra throat depth for versatility. In contrast, F-Clamps offer an impressive 1200kg (2600lb) capacity with a tempered steel sliding arm, drop-forged and electro-galvanized for corrosion resistance. Their rail, fixed jaws, and pressure plate are heat-formed from cold-drawn profiled steel in one piece, optimized for high static stress, while the heat-treated, high-carbon Acme threaded screw is tempered and quenched for enhanced loading capacity and longevity, with spatter resistance and a substantial 5½” (140mm) throat depth for broader clamping applications.