Review on Inch and Metric Fastener Thread Checker: Bolt Your Worries Away! by Robert Ducki

I'm so glad I bought this thread checking tool, it covered 95% of the nuts and bolts in my 5 gallon bucket and now they're all organized in bins, no throwing away the bucket and no waste more precious time looking for a nut or bolt. I was very relieved when I finished sorting. I only had one basket with odd ball studs and one basket with odd ball nuts that I couldn't size.