This adapter allows a Cinelock quick release to attach to a Preston Hand Unit (HU3 or HU2) without twisting. It fits over the rectangular accessory block normally used for a Microforce bracket. Super handy to quickly attach and detach an Ultralight arm or Noga arm to hold a monitor, or mounting the hand unit to a stand, etc. The anti-twist cradle is machined from 6061 aluminium and anodised black.