Threaded hub cast of high strength, highly conductive bronze|Allows entry from any direction|10 to 2/0 AWG solid stranded wire size|Rotating Hub, Swing type conduit hubs rotate 360 deg around the grounding clamp to make alignment simple, no matter the direction of your install|Bronze and Steel, The conduit hub is made from bronze, while the tightening screws are made from reliable zinc-plated steel, both of which provide durable long-term use|Interchangeable Design, The adapters and hubs of NSI grounding clamps are interchangeable, allowing for adjustments on the fly and greater installation flexibility