The Feyachi FL11 flashlight is made of aircraft-grade aluminum alloy with black anodized matte finish, which makes it durable and shockproof. It has waterproof o-rings with the anti-abrasive coating so the flashlight can be used in the rainy day.The offset mount is equipped with QD cam lock, can be quickly attached or detached structure in seconds. The allen wrench and 4 screws to mount your led light conveniently are also included. Comes with a constant on button switch and a momentary on pressure switch (2 modes) for different tactical need. Tactical, military users will enjoy the dual-switch tail cap which allows for easy single-handed operation. Press the tail button to switch, easy to control.