Black Pro Universal Gun/Fishing Rod/Bow Fixing Clip Mount Set Sportsman Mount + Black Pro Big Pouch +Black Pro Lanyard for Gopro Hero 3+/4 1. Can fixed Gopro to the guns, bows and arrows . 2. Application: barrel, fishing rod and bows w/ diameter of 0.4 "to 0.9" (10mm to 23mm) 3. Compatible with most guns. 4. Fixed one or two cameras 5. When used in firearms or fishing rod, the camera can be fixed in below or to the side.