BoltSize-It Bolt & Nut Gauge

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)