Makita 784827-A Quad-Driver 4-Piece Reversible and Self-Centering Pre-Drill, Drive and Countersink Set Makita 4 piece quad driver reversible, self-centering drill and driver guide set Self-centering drill bit provides perfect mounting of hinges, strikeplates, brackets, and latches Patent Bit-Lok system holds screwdriver bits securely; easily transform from a drill and countersink to power screwdriver Includes quad driver shaft, built in hex key, number 6, 8, and 10 drivers, and case Backed by Makita's 1-year warranty