Hi folks, thanks for the kind words and introductions.

I'm busy trying to find a socket for an internal part on an R – 2800 engine. The Pratt and Whitney part number is not important, I'm interested in finding out if anyone can point me towards a diverse manufacture of spline sockets for either quarter inch or  3/8 inch drive .

Any information gratefully appreciated, John

Google spline sockets, Auto Zone has a set and of course the big names make them too.