The Zacuto Top Plate of DSLR Baseplate is the top plate of a Zacuto DSLR Baseplate rig.
The Top Plate features a 1/4" screw for mounting cameras or large lenses outfitted with screw-holes. Having a Top Plate in addition to the one the Baseplate comes with lets you switch cameras / lenses to and from the Baseplate by quick-release functionality.