Now you have a choice of momentary or constant-on light activation without having to rotate the tailcap of yourĀ SureFire flashlight. Push lightly onĀ SureFire Click-on Lock-out Tailcap Z61Ā for momentary activation, push harder to click theĀ Flashlight AccessoriesĀ into constant-on mode, click again for off. Precision machined aerospace-grade aluminum construction, hard anodized in black. Lock-out feature ofĀ Sure-Fire Z 61 Click On Lock Out TailcapĀ prevents accidental activation of light during tactical operations, transportation, or storage.Ā SureFire Z61 Click on/Off TailcapĀ fitsĀ SureFire Executive Series flashlights, includingĀ SureFire E1E,Ā SureFire E1L,Ā SureFire E2D,Ā SureFire E2E,Ā SureFire E2L, SureFire E2O.