On Wed, 11 May 2016 01:25:58 -0400, wrote:

On Tue, 10 May 2016 15:31:13 -0700 (PDT), Pavel314
wrote:

Why don't you paint the handles of your metric wrenches red so that you can identify them without reading the size?

I have a bunch of metric snap on sockets and they all have knurled
rings around them to differentiate from SAE
That works if all your tools are the same brand - not all companies
make the differentiation in the same way - if at all.

Another solution is red or blue or black chrome for one or the other -
again only if allyour metric or SAE tools are the same.