ZUDs convert 1/4 20" or 3/8 16" bolts into 15mm rods to fit Zacuto Z-Release components such as Z-Mount, 15mm Z-Locks, ZicroMount and all other Zacuto 15mm locking devices
A ZUD 1/4 20" male (retrofit any 1/4 20 female with Z-Release) is used to retrofit your existing articulating arm, giving you Zacuto Z-Release (quick release) action on one or both ends of the articulating arm.