ITEM NAME:Scuba Diving Backplate Book Screw Underwater for Mounting Hardware Backpads Description: - Scuba diving replacement bookscrews for the back plate pad. - Made of marine grade chrome-plated brass,lightweight and durable. - Attachment screws for underwater use. - Used for mounting hardware and backpads to backplates. - Length:Approx.1.7cm/ 0.7inch;Diameter:Approx.1.9cm/0.74inch Package Included: 1 Piece Scuba Diving Book Screw Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!.Used for mounting hardware and backpads to backplates. 1 Piece Scuba Diving Book Screw.