I have been to the hardware store too many times, unable to verify the size of the nuts, bolts, washers, dowls, molding etc, so I desgned my own mini measuring tool that fits on my keychain. Others are usually too big or just inaccurate. Includes the following Measurements 1mm; 2mm; 2.5mm, 0.5 cms, 1 cm, 2 cms, 1/16", 1/8", 1/4", 1/2", 1 inch, 2 inches.