Mini Clamp DAC-25 Desmond 25mm Arca-Swiss Compatible w 3 Strap Bosses Boss Includes 3 Strap Bosses will accommodate any Arca style plate from various makers including: Really right stuff (RRS), Wimberley, Arca Swiss, Kirk Enterprises, Markins, etc. 25mm (1") in Length. 3/8"-16 thread with metal 1/4"-20 Adapter Weighs just 37g (1.3oz)