Rec-mounts Conversion Adapter for Gopro(gp Standard&rarr;camera Screw(1/4) Action Cam From Gopro Mount Hdr-as30 Hdr-as15 Adixxion Gc-xa2 Gc-xa2 (Aluminum S Type) conversion adapter1/4 camera screw from GoProGPstandard material alumi16gGP-CN-A is tightened by allen key.GP-CN-A2 needs cross screw provide mounting bracket(sold separately). only conversion adapter. GP-CN-KW GP-CN-KD for large size setting check attached mounting type and camera positon. it may be not fit, interfere, need extention adapter. facebook https://www.facebook.com/recmounts cycle catarog(PDF) http://www.an-y.com/img/rec-mount-catalog3.pdf