Thread Detective Screw Gauge, Metric Review

Average Reviews:

(More customer reviews)First, I'll say that the image is rather deceiving. You don't get both the black and red strings of balls when you purchase this item. You only get the red string with the card, which is the metric gauge set. The black string is the Standard gauge, for inch nuts and bolts.
Now to the gauge, which I'm quite pleased with. Each ball is clearly marked and has a nut and bolt gauge with plenty of thread to actually screw into/on with the nut/bolt you're trying to identify. It seems to be a well made, durable product. I've also ordered the Standard gauge, even though I have a more common flat gauge for inch bolts and screws. The ability to easily check nuts as well as screws, is a very nice feature.
5 stars for this device.

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Whether you're trying to identify loose screws or you just want to figure out which nuts and bolts to use where, the Thread Detective is the perfect tool. Available in standard or metric (sold separately), it features clearly marked gauges for quick identification ofbolt size, nut diameter and thread pitch. Standard guages are black with 13 measuring gauges. Metric gauges are red with 11 measuring gauges. Includes heavy-wire lanyard and handy inch/mm ruler for measuring studs.Metric (red) Thread Detectives include the following thread gauges:* M12x1.75* M10x1.5* M8x1.25* M5x0.8* M12x1.5* M10x1.25* M8x1.0* M4x0.7* M12x1.25* M10x1.0* M6x1.0