Handy Measurement Gauge

Illinois Industrial Tool. SAE and Metric measurements. Quickly measures drywall screws, eye screws, lag bolts & screws, hex-head screws & bolts, sheet metal screws, wood screws, machine screws and many other styles. Measures nuts by inside and outside diameter. Stores easily in toolboxes. Heavy duty black plastic about 9" x 4" in size. Checks UNC and UNF, Inch and Metric. Very handy for fast and accurate checking of sizes. Bolts, Nuts, screws and screw heads as well as drill bit sizes. Nice thin design of about 3/16" edge thickness.