Introducing the 4 in. Keyed Bridge Hose Clamps by POWERTECCommonly used to connect hoses to dust hoods, blast gates, connectors and other fittings - these high quality hose clamps can be an essential tool for a wide-range of indoor & outdoor woodworking, automotive and industrial applications. The key is designed to make the securing and un-fastening of the hose much easier, by hand and without the use of any tools. Simply turn the key clockwise to tighten, counter clockwise to loosen. The clamps have an integral bridge component that steps over the tubing's helical reinforcement, delivering a direct transfer of force to the connection, which helps eliminate hose detachment and pressure loss from leakage. The 4 in. x 10 ft. PVC Dust Collector Hose - POWERTEC 70111 A practical, safe and cost effective dust collection hose designed to enhance your existing workshop dust collection and filtration systems. Flexible Versatility Whether you have an industrial vacuum cleaner or a centralized dust collection system built into your shop, you understand the importance of having a super lightweight, flexible and kink-proof dust collection hose that can withstand the rigors of everyday shop use. Innovative Design Features Flaunts an impressively translucent body, reinforced by interior spiral spring steel wire allowing you to monitor your air movement performance, debris collection and fine dust separation/ filtration.