SwitchBack DF Flashlight Ring - Thyrm (Black)The SwitchBack DF Flashlight Ring has an inner diameter of 1. 12 inches, so it can fit tailcaps of this size on some larger lights (see compatibility guide). (*It is NOT COMPATIBLE with the DF Turbo, EDC1 DFT, and EDC2 DFT SureFire lights. The SwitchBack 3. 0 EDC DFT can be found here.) FEATURES Like all our SwitchBacks, it can be used with handguns or long guns, allowing the user to: Reliably deploy and index a flashlight from both pockets and