The Makita P-70552 is a 4 Way Driver and Bit Set (28 Piece). The professional quad driver set which includes 24 x 25mm screwdriver bits, quad driver barrel, quad driver body and screw guide. A high quality professional set in which the quad driver body can be fitted into the barrel in 2 ways, the first as a screwdriver and secondly as a pilot drill and countersink/counterbore. Designed for professional use. The screwdriver bits can also be used in the high quality magnetic screw guide.