Surefire Z49 Click-On Tailcap SwitchNow you have a choice of momentary or constant-on light activation without having to rotate the tailcap of your light. Push lightly on the click-on lock-out tailcap for momentary activation, push harder to "click" the light into constant-on mode.
High-quality aerospace grade aluminum construction, featuring precision machining with the addition of a lock-out feature and a raised rubber lip to prevent accidental discharge of light during tactical operations, transportation, or storage.
Fits: All flashlights Flashlights with a 1.0" tailcap
Screw tail-cap to click on. 
