In article ,
dennis@home wrote:

These guys back off with the torque wrench and then tighten it.
The do use the air wrench to put them on but it doesn't do them up tight,
they are usually adjustable to stop them over tightening.



some of these places use torque sockets - there is a longer stem between
gun and socket that twists. Idea is it's impossible to over torque it
(assuming they use the correct socket...).

We were sceptical but when tested, they worked everytime.

things like http://www.torqstik.com/ - my dad has a set of snapon ones
but I suspect they are all similar. Wouldn't rely on somewhere like ****fit
using such a thing though - just that it's possible.

Darren