“The Thyrm SwitchBack,” a review by Sylvester Scott (guest writer, known for his blog One Weapon, Any Tool) of the SwitchBack Flashlight Ring, at Home Defense Gun in September 2014:

HomeDefense“… every so often a product comes out that is actually worth talking about. While I’ve carried, bought, used, tested, broken and discarded hundreds of dollars of gear over the years, once in a great while I come across piece of kit that works, is simple, and actually meets the definition of tactical. This time around it came in the form of a flashlight accessory. … Unlike the Ayoob, Chapman, Surefire, FBI or Harries techniques, the Switchback from Thyrm goes right to work and requires very minimal conscious manipulation to become proficient.”