US Patent 7028588 Tool having easily identified size

A tool comprises a surface area, the area being printed in one of two different first colors for identifying the tool as one labeled in either the British system or the metric system, and a numeral as a representation of a size of the tool disposed in the area, the numeral having a second color different from the first color of the area for providing a contrast of the numeral to other portions of both the area and the tool. The correct size of the tool thus can be quickly identified. Moreover, a number of embodiments are made possible.