Arkon's SPRMET Metal Mount Shaft is part of Arkon's Robust Mount Series and can be used with 25mm (1 inch)-compatible mount bases and heads to create your own custom mount solution. This includes only the Metal Mount Shaft (holders and adapters sold separately) with tightening knob. The mount shaft arm is made of aluminum and measures 3.75" tall. Use SPRMET along with your choice of mount head and base (sold separately) for creating a 25mm mount solution with ultimate flexibility on both ends of the mount. Use Arkon's adapters to create either a 4-Hole AMPS (Model APAMPS25MM) or suction mount (Models SPRM079 or SPRM080) base, or a Dual-T (Model APRM2T), 4-Prong (Model SP25MM4P), 1/4"-20 camera (Model SP142025MM), lateral GoPro (Model SP25MMGP), VESA pattern (Model AP25MMVESA), or 4-Hole AMPS (Model APAMPS25MM) mounting pattern head.