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 CR-123 Lithium batteries.