The SPRM256B Robust 6 inch Aluminum Mount Shaft is part of Akron's Robust Mount Series and can be used with 25mm (1 inch)-compatible adapters and holders to create your own custom mount solution. This includes only the Large Aluminum Mount Shaft (holders and adapters sold separately) with tightening knob. The mount shaft measures 6 inches (152mm) tall, and along with your choice of mount head and base (sold separately), you can create a mount solution with ultimate flexibility on both ends of the mount. Use this mount shaft with Akron's APMAMPS25MM adapter to create a metal 4-Hole AMPS mount.