These casters are surprisingly good quality (especially considering the price point). One other review mentioned that theirs was 'rough around the edges' but mine had no such issue. Couple of other points:- The locking mechanism appears to work well and locks both the rolling AND the rotation of the caster, so that's nice.- The casters roll very smoothly with pretty low effort.I should say I've only had them for a couple of days so i cant comment on how they hold up over time.