Quickly and accurately measure standard size drill bitsFeatures a ruler marked with inches and millimeters32 sizes ranging from 1/16" to 3/4"Constructed of thick hard plastic for lasting durabilitySmooth easy to clean surface that resists oil and greaseA shop essential, this sturdy lightweight plastic gauge will easily fit in your shirt pocket or tool chest drawer. This is a must have for the professional mechanic or home hobbyist for quickly measuring those drill bits in your shop drawers.