Hardy is Clash’s firm putter plastic. Clash sells its putter blends as a pair, and Hardy is the stiffer half, built to hold its shape rather than flex in the hand.
Firm putter plastic suits players who want a consistent release and don’t like a disc that folds on the grip. It still has the tack of a baseline putter blend, so it isn’t slick, just less gummy than Softy.
It’s a feel choice more than a flight one. If you like a putter that gives under the thumb, this isn’t it.