Micro Rosette to TWIST Spud is one part of a modular accessory arm, allowing attachment of a wireless transmitter, monitor, audio receiver, and more to a camera. This component is useful when building a hinged monitor mount and allows a second pivot point for folding a monitor over when packing equipment. For a better idea of how this works, check the Micro Rosette Monitor TWIST Hinge Kit (1/4-20 to 3/8-16). Micro Rosette to TWIST Spud (Hole) is the version with a 1/4-20 threaded hole. Micro Rosette to TWIST Spud (Screw) is the version with a captive 1/4-20 screw. If you need a more complete monitor mount set, consider: Micro Rosette Monitor TWIST Hinge Kit (1/4-20 to 3/8-16) Micro Rosette Monitor TWIST Hinge Kit (1/4-20 to 1/4-20) A Complete Kit is also available and includes additional pieces: Micro Rosette Complete Kit