Hammerhead Industries Gear Keeper RT3-0082 Locking Large Flashlight and Camera Retractor Brass Bolt Clip Mount with Q/C-II Split Ring Accessory Retractable Tether for Large SCUBA Flashlights (4-C to 8-D)and Cameras 12-oz Retraction Force 42" Extension 80-lb break/release Swiveling Brass Bolt Clip Quick Connect Gear Attachment System with Q/C-II Male Stainless Steel Split Ring LOCK the retractor on land to secure heavy lights/cameras and UNLOCK underwater for low resistance extension while still retracting when not in use