Introducing the 2-1/2 in. Double Wire Hose Clamp (10-pack set) by POWERTEC. These clamps are designed to provide a quick and secure attachment for your dust hose to your dust collection fittings. Whether you're just starting to assemble your dust collection system or in need of replacement hose clamps - these 4 in. wire hose clamps are an essential tool to connecting your piping to your blast gates, dust hoods and fittings. Easy-To-Use: Simply tighten these clamps by turning the screw with a Phillips screwdriver or hex head wrench. Double Effective:- They feature a steel spring double loop construction, distinctively designed to deliver an impressively tight grip on suitably sized hoses, securing them in place, while maintaining a consistent pressure. Specifications:-. Material: Carbon Steel, Clamping Capacity: 2-3/8 in. ~ 2-3/4 in., ,Finish: Zinc Coating.