Sure, they're not the cheapest but these are really solid, ergonomic adapters that handle large centre 45s really well. (edit - they seem to have been discounted a bit at the mo, so they're now not that expensive at all considering the wooden box they come in too). I'd been after a set that really snugly held 45s in the middle but also with a bit of downward stabilising pressure for slightly dished discs - and these do both those things. Maybe the only thing to consider is that they need removing each time you change record because they act as weights too - so that might slow down your DJ Koco-style quick mixing by a second or two each time. But I'm guessing, physics being what it is, that adaptors couldn't weigh down 45s without actually being on top of them, so that can't be avoided. Full disclosure: I've been emailed an incentive discount coupon for future purchases if write a review, but that's only been an incentive for me to write what I thought anyway. I'm not bigging them up on that basis - these are just good adaptors.