29 Measuring Holes: 0.062-0.50 Bolt and Wire Diameter Index Gauge, Identified drill bits from 1/16" to 1/2" in 1/64th increments, From 1.59mm to 10.32mm, come with clearly marked fractions and decimal for accurate measurement

High Quality Material: Made of high-end rustproof stainless steel. Making from single pieces, they are sturdy and durable. They can gauge the drill bits quickly and easily when working with older, unmarked drill bits especially the bits are too small to fit diameter markings. Very slight but practical equipment in your home tools box

Excellent Design:Precision machining holes，Etched markings graduations to give high contrast and will not wear off. It is easy to hang which provides convenience for your work with a hanging hole design

Package Includes: 1 x Silver and 1 x Black of bolt and wire diameter index gauge which have been clearly imprinted with Black/Silver graduations, creating a vivid contrast, helpful for you to read measurement of bit sizes quickly and accurately

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