Every machinist chest I ever bought has had at least a dozen hex keys (allen wrenches). Now I've got 12 pounds of them (not kidding - I just threw them all on the postal scale.) all jumbled up into one big pile. Does anyone sell a hex key gauge -/QUOTE]
There are vernier calipers that have fractional inch readout. So, yes, you can (assuming you can tell the metric from the inch)
sort 'em quicklky. A white paint band around the metric ones is a timesaver.
More important, it's wise to keep one complete-ish labeled set of inch and one of metric, and, when you
need to dedicate a wrench to the accessory kit of an important widget, THAT's when you search the bucket.
That way, you only have to search the complete set (less than 12 pounds) to learn it's really a Bristol spline...
My overstock, actually, is in a bag, not a bucket: maybe I should upgrade...