24 Hobby Drill Gauge offers a quick and accurate way to check drill and rod sizes. This fractional drill gauge is a useful guide for identifying drill bit sizes and has 29 measuring holes for determining twist drill sizes from 1/16″ to 1/2″ in 1/64″ increments. The tool shows drill sizes in both inches and decimal equivalents. Etched graduations are filled in black to give high contrast and will not wear off this drill gauge. The gauge measures 2-3/8 inch x 6-3/4 inch (60 x 172mm) overall and is made from stainless steel to prevent rust.