GoPro Magnetic Latch Ball Joint Mount / AEMAG-002

Quick overview from the supplier:

GoPro Magnetic Latch Ball Joint Mount, Includes 1 Magnetic Latch Ball Joint Head and a Ball Joint Socket Mounting Buckle, compatible with HERO13 Black Camera and all GoPro Mounts Except Shorty, Head Strap, Tripod, Max Grip and Volta, 165x100x27, 20g