49-Piece Nut and Bolt Thread Checker | 15 Metric & 15 Standard Sizes with 19 Drill Gauges, Wall-Mountable Bolt Size Finder for Quick Identification (DIY/Automotive/Industrial)
Precision Thread Gauge: The bolt size finder is made of CNC-machined anodized aluminum alloy 6601 and superior quality steel bolt. All bolts and threads meet Go & No Go Class 2B ANSI gauging standards, guaranteeing reliable performance, say goodbye to the hassle of guessing nut and bolt sizes and hardware mismatches