100mm Skeleton Clamp DAC-100B w Level Desmond Arca Compatible / for Tripod Head 1/4" / 3/8" All Metal (aluminum) Construction No Rubber or Plastic Parts. will accommodate any Arca style plate from various makers including: Really right stuff (RRS), Wimberley, Jobu Design, Arca Swiss, Kirk Enterprises, Markins, etc. Includes Removable Bubble Level 3/8"-16 thread with metal 1/4"-20 Adapter Weighs just 111g (4oz)