Armaspec Fulcrum45/90, Ambi Safety Selector, Fits AR-15, Anodized Finish, Black ARM213-BLK The Armaspec FULCRUM-45/90 is an ambidextrous 45 or 90 degree safety selector that allows the shooter to choose from running it as a 90 degree or 45 degree. Its easy to reach levers and incredibly smooth action makes position selection a natural" fluid movement for the operator while having a super crisp lockup" leaving you no doubt about your safety status. Once installed" the FULCRUM-45/90 operates easily from either side of the receiver for intuitive use in the field by a variety of shooters in any circumstance.