At the moment, I really only need three (ordinary) wrenches for my
new Snappy quickchange drillbit adapters. An old friend said that
open end wrenches tend to spread with a lot of torque. A cheap set of
Stanley wrenches at the local megastore has a lifetime warranty, but
shipping would be more than the cost of one wrench, sounds like a
silly warrantee.

Is carefully using a vice grip on the threaded nut part of a Snappy
quickchange adapter likely to destroy it? The base can be held with
the included hex nut and a socket wrench.

Otherwise... Suggestions for a small wrench set?

Thanks.