Torque angle gauges

[marlinspike]

As far as I can tell, there are 3 types: ones that have the L-shaped bar, ones that have a flexible extension with a magnet coming off one side, and ones that have that magnet and a clip on the other side. Can someone tell me the pros and cons of the types?

 

[jeeper93436]

are u doin this for a living? if u are get a Techwrench. i was using the one with a L shape deal, time consuming vs techwrench