I have 1/4, 3/8 & 1/2 dr Metrinch socket sets as I was sold on their wall grip design. The sockets themselves are fine, but the tm ratchet handles leave abit to be desired.
They will generally tackle less common bolt sizes like British standard etc. This came in handy our once when a guy I knew had an AEC bus he had converted to a camper and it had a semi auto gearbox with soft copper gearbox plugs in the fluid flywheel which required single hex sockets to avoid damaging the soft bolts, and the Metrinch removed it with ease, to check the oil level of the box.
One time though, I had to remove a tiny nut and the 3/4 drive couldn't do it, but by cheap sub $10.00 combination set had the exact size needed.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!