Dailyardtool® Nut & Bolt Head Size Gauge

Whether you are working on automotive, home improvement or mechanical tasks, this measuring instrument provides reliable dimensional verification on a wide range of bolt and nut types.

Ideal for use on construction sites, factory floors, maintenance services, daily maintenance, etc

Convenient to carry in a pocket or clipped on a keychain

Gauge SAE: 5/16 in. – 1 in. and Metric: 8mm – 25mm