43 Threaded Holes Protective Aluminum Underwater Housing Cage for GoPro Hero 3, Hero 3+, Hero 3 Plus, Hero 4 Camera - Black Can be used with the Hero 3, Hero 3+ and Hero 4 underwater housing or skeleton frame Full cage coverage provides a protective design that is impact-proof, crash-proof, and crush-proof Secured by six points of contact, which means you will not have to rely on just a finger mount 43 Threaded holes. Compatible with all GoPro camera add-on accessories Full access to all GoPro ports, switches and card slots