The STC-S-MFT with Vertical Clamps Set by BESSEY is a comprehensive clamping system that consists of a metal clamping frame, plus seven different sized vertical clamps. The frame is made out of heavy-duty cold-rolled steel for durability, while the clamps are made from a hard plastic with a non-marring surface. This system is perfect for clamping a variety of materials, such as metal, wood, plastic, foam, and more. The vertical clamps feature an asymmetrical wide-opening design which helps to ensure that the clamp stays put, and the non-marring surface helps to keep your workpiece free of scratches. The set also includes a carrying case, making it easy to transport.