The GRIPPA Series Beam Clamp is the world’s premier heavy duty industrial grade beam clamp for harsh environments, including marine use. Note worthy features of our Grippa clamp is the heavy duty design, high quality autolac paint, and corrosion resistant clamp screw. These clamps range from 1 to 32 metric tons, in stock, ready to ship. This clamp series is also offered in a 100% stainless steel construction..