The TWM-850XL Xtreme Lumens Tactical Weapon-Mounted Light uses a CREE LED rated 850 lumens working in conjunction with a high-efficiency deep parabolic reflector to create a usable beam of light rated at 245 meters. This weapon light features a unique and completely ambidextrous dual-dependent toggle switch on each side of the light to operate the momentary-on and constant-on lighting modes. The housing of the TWM-850XL is constructed from aircraft-grade 6061-T6 aluminum with a glass-filled nylon polymer battery door and toggle switches. Includes 4 Sets of cross-rail inserts (2 inserts each to fit GLOCK, 1913, TSW/99, 90two), 4 cross-rail mounting cap head screws, Allen wrench, and 2 CR123 lithium batteries.