The Sea & Sea Right Replacement Ergo Grip for DX / NX / MDX Series Housings is a right-side hand grip for the Sea & Sea DX / NX / MDX Series DSLR underwater camera housings. Its ergonomic design provides added comfort and ease of use. The grip attaches to a tray, which mounts on your housing. Grips allow you to attach arms, strobes and lights that can then be adjusted and maneuvered to enhance your underwater photography/videography experience. This replacement grip, however, does not have a mount on top. You need to use the top mount from your original grip or purchase the SEA&SEA bracket shoe (#20100) to accommodate a SEA&SEA slide mount or ball base for DSLR armsets.