Faithfull Spring Clamps are made from high strength engineering plastic with a durable long-life spring. They are easy to use with a contoured grip for one handed operation. The clamp heads will self-adjust to suit the thickness of the material being clamped. Ideal for all of your general-purpose clamping needs, from holding material whilst fixing, to simple tasks such as securing sheeting or tarpaulins. This 8 Piece Set contains: 4 x 2in (50mm) Spring Clamps, Clamping Capacity: 12kg. 4 x 3in (75mm) Spring Clamps, Clamping Capacity: 15kg.