The Streamlight TLR-9 Flex includes customized ergonomic switches featuring a low or high position to match your shooting style. It features an ambidextrous on/off switch and a rail clamp that is designed to rapidly attach and detach from a broad range of full frame weapons. Its low-profile design prevents snagging and a safe off feature prevents accidental activation, saving your batteries. This kit includes an already mounted high switch, low switch, two CR123A lithium batteries, and a key kit.