The Manfrotto Adjustable Mounting Bracket is a part of the Bogen/IFF Studio Rail System. It allows height differences in ceilings of maximum 2cm; combining two brackets you can compensate for differences of maximum 4cm.
The 3/8" Finger Nuts are used to securely lock the 9.Solutions 3/8" rods to different accessories. The 3/8" Connecting Nut is used to connect multiple 9.Solutions 3/8" rods together, allowing you to make longer rods.
Multiple rods can be used to create larger structures for rigging small cameras, lights, and a variety of other equipment.