This 9-piece set in wooden case contains nine flat-head screwdrivers in sizes 0.5, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 2.0, and 2.5 millimeters, along with 33 spare blades for each in a separate container. Both the handles and the containers are color coded for easy organization.