
This narrow wrench set works well for its intended purpose. These are lightweight wrenches for holding threaded items that have little access (examples are the sliding parts that brake calipers bolt to (my primary use) or holding flare nuts on a bike axle while tightening an axle nut). . Not intended as a lightweight, easy-to-carry replacement for traditional wrenches that have plenty of room to fit a thick and durable wrench onto a nut or bolt. Since one review complained that the hole size was different from the advertised size, I used a digital caliper to compare some of these wrenches, which are of the same quality as regular thick open-end wrenches, they were both about a tenth or two of a millimeter larger than the size listed - not a wrench expert, but this is probably to make it easier to put the wrench on the nut. The keys are stamped from thick sheet steel, 3mm thick for smaller sizes (from 8 to 17mm) and 4mm for larger ones. They are beautifully coated and the reel seat appears to be carefully sewn from quality material. I'm sure they will last a lifetime if used for jobs where just a thin wrench will suffice.

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