This NiteRider Adapter is sold separately from K-EDGE "Combo Mount." - Precision Machined 6061-T6 Aluminum - Anodized Gunmetal - Converts a NiteRider Rail Interface to adapt K-Edge GoPro Mounting Interface - Enables compatibility with K-Edge GoBig Mounts and Combo Mounts - 2x M4 Mounting bolts with Nylok included - Compatible with Lumina Series, Mako Series - Weight: 11.5 grams