COMPATIBLE - Cameras with ¼"-20 Interface (majority of cameras), Ideal for carbon fiber or aluminum handlebars and all seat rails. * MATERIAL - CNC machined 6061-T6 Aluminum, Stainless Steel ¼"-20 Thumbscrew * FITMENT - 31.8mm diameter handlebars, the majority of seat rails. Adapter fits to all Go Pro interfacing mounts, including K-EDGE GO BIG. * COMPATIBLE - Universal Mounting system for the majority of cameras * STRONG - CNC machined aluminum mount gives a rigid (over/under) platform no matter how big you go.