2616-7643 Features: -New modular design .-Bit-LokTM system .-For securing drill bits, countersinks, and screwdriver bits .-11 piece set includes #6, #8, #10, and #12 Counter Sink Quad-Drivers, Industrial Quad-DriverTM Shaft with built-in hex key, 1/2" Hex Coupler, and five #2 Phillips bits in a plastic reusable case .-Carded .