Recommendations for stud extractor / setter

[Mark R]

I bought a set from Halfords a few years ago, metric but they fit the imperial studs I've used them on, if needing a wiggle to get them off occasionally. It uses a cam type roller system rather than the knurled single cam type which really does chew up studs. I'd say the roller system is quite kind to the studs, smooth as the rollers are they don't seem to slip but will mark a stud if you need to apply a lot of force.