Thread Detective Thread Identifier / Thread Checker 20-1/2 in. L X 2 in. W Thread Gauge

This is the perfect tool for identifying metric and imperial thread pitch on both bolts and nuts. Each gauge is permanently laser etched with the thread size for quick identification of the size and thread pitch of both nuts and bolts. One end of each gauge checks the nuts whilst bolts can be threaded in the other end. There are 14 imperial gauges in red and 11 metric gauges in blue. They are conveniently assembled onto a lanyard wire loop that can be hung from a nail up in the workshop for fast access.