8 Replacement Hinge PINS Replacement Parts for Monster Beats by Dr. Dre Studio / Studio 2.0 / Studio Wireless Headphone Headband Compatible for Monster Beats Studio / Studio 2.0 / Studio Wireless Headphone Headband ( Not for Monster beats SOLO ) For loose or missing part of your headphone. Metal pins keep those hinges connected to your headphones Package include: 8 x replacement hinge PINS Made of metal, solid and durable. Fit as well as original. Replacement parts only.