Brownells 3-Piece AR-15/M16 Carrier Key Bit Kit

The Brownells 3-piece carrier key bit kit includes two hex bits designed for the installation of bolt carrier key socket head screws, along with an adapter to connect the carrier key bits to a 3/8 inches drive torque wrench. The kit features 1/8 inches (185-2) and 9/64 inches (185-10) hex bits, suitable for both early and late model firearms.