Excellent for sizing bolts, screws, nuts (USS, SAE, and Metric) and twist drills

Size bolt diameter by pushing bolt through sizing holes

Gauges hex nuts and washers (USS, SAE)

Gauges metric hex nuts and washers by holding under metric holes

Measure US and Metric thread pitch

Special notch gauges flat headed metal and wood screws

Ruler marked with inches and millimeters for worldwide use

Resists water, alcohol, oil, and grease

Reliable and Accurate

Sturdy and Lightweight Plastic

Fits in Shirt Pocket (8-5/8" x 3-1/4" or 217mm x 82mm)