P-5 Universal Camera Body Plate.
The P-5 features a thin layer of dense, textured rubber on its top surface. This coating grips the bottom of your camera, but is so dense and thin that it maintains the solid feel of a metal-to-camera connection.
Beneath the rubber, the top surface of the plate is machined to ensure that the frictional force is concentrated on the outer portions of the plate. This provides the maximum mechanical advantage to resist twisting.
The P-5 will work on nearly any camera body. It is best suited for high-end cameras that have metal skeletons and metal threads. It will also perform well on less expensive, plastic-bodied cameras, but it is important to use caution and not over-tighten the plate on these cameras