Oumers Universal Clamp Mount Set For GoPro Camera, Fixing Clip Mount Kit For Gun / Fishing Rod / Bow Fixing Clip, For GoPro Hero4 Session, Hero 4 3+ 3 2 1 HD, For GoPro Session Camera Accessories Can fixed Gopro to the guns, bows, arrows and so on Application: barrel, fishing rod and bows diameter of 0.4 "to 0.9" (10mm to 23mm) Compatible with most fishing rod grips, bow components, Shotguns, Rifles, Paintball Guns (any Gage any Caliber), also can be used at the house,home studio,microphone stand, bikes and so on. Compatible with all GoPro cameras, GoPro HERO 4 session / 3+ / 3 / 2 / 1 Note: No backdoors in.