SmallRig Crab-Shaped Clamp 5319 is made from aerospace-grade aluminum, ensuring durability and strength. It features 1/4"-20 threaded holes and 1/4"-20 locating holes for versatile expansion. The swivel tip design of the clamp improves compatibility with both flat and rounded surfaces by adjusting the swivel of the clamp tips to ensure equipment stability. The clamp can be attached to surfaces up to 50mm (2.0in) wide and lined with protective pads to prevent scratches and increase clamping stability..