Wimberley P-40 Lens Plate.
The Wimberley Arca-Swiss style lens plates come with safety stops at the front and back of the plate in order to prevent your lens from accidentally slipping out of the quick release clamp. The double dovetail cross-section on the plates allows you to attach Wimberley flash brackets to the upper or lower surface of the plate. Wimberley plates are ideal for Wimberley's flash bracket system components but have been milled to also accommodate Really Right Stuff and Kirk flash brackets. The P-40 plate does not have an anti-twist flange; please secure it with multiple fasteners.
* Four fasteners and a hex key to secure them to the lens plate.
* Three screws (two captive) and their hex key to affix the plate to the lens.