The Camel Back Straight Key Made With CNC Machined Aluminum. Liquid Smooth Dual Self Lubricating Bearing Action!Solid Brass Contacts & All Soldered Connections! Features CNC Aluminum Machined Arm Pivot Arm...With Easily Adjustable Gap And Tension No Rust! - Aluminum & Stainless Steel Hardware All Anodized Aluminum Base And CNC Machined Block Non Marring Non Skid Rubber Feet Made with Injection Molded Plastic, Similar To Milk Crates! Solid Brass contacts for Solid Contacts! Dual Self Lubricating Bearing Action for a Great QSO. Allen Wrench Included. Connections: The Camel Back uses Thumb Nuts and Threaded Posts to connect using tinned wire ends or a soldering lug... Adjustments: Tension and gap adjustments are shown below... * Uses Copper Braided Wire with Tinned Ends & Solder Lugs On Post Connections Dimensions: Cleaning And Maintenance: Cleaning is best using a small dry paintbrush. Should the contacts become tarnished, clean as shown below...