Magnetic Octo clip
Secure your backup regulator to your scuba BCD to ensure it's there if you need it. One end clips to your backup regulator hose, securely attached and screwed in place. The other half clips to a d-ring on your BCD. The two sides are connected and held in place with a very strong magnetic. Quickly release with a quick tug and easily put back in place and secured by the magnet.