Makita 784859-A Quad-Driver 11 Piece Pre-Drill, Drive and Countersink Set Industrial quad-driver modular set for use in securing drill bits, countersinks, and screwdriver bits This set lets you do 4 jobs with 1 drill Change from a drill and countersink to a power screwdriver. Includes quad driver shaft, built-in hex key, #6, #8, #10, #12 countersink drivers, and case Weighs 9 pounds shipped