Battle Arms Development. Ambidextrous Safety Selector. AR-15 & AR-10 platforms. Precision CNC Machined from bar stock steel. Tor screw should be approx 5 lbs. Do not over tighten. (1) Safety center. (2) levers. (2) torx screw. (1) stainless safety detent. (1) T10 Torx L-Key. Choice of colors. Made in U.S.A.