Using (or trying to) various countersinks on chipboard flooring, most didn't do much and one that did work got very hot and took about 30s per hole [1] Without spending a fortune, are there countersinks that will cut various materials without setting fire to them? (I have both fluted and 'snail' type and they're OK on ordinary wood).
Centre punches: could do with something that will handle steel and stay pointy [2]. Also need pin punches that don't bend too easily.
I've looked at SF and TS; they have largely sets, which I don't mind if they're good. Axminster's countersinks seem to start at dearish and go to FO!
[1] Solved it for chipboard by blipping the hole with a slow, 10mm masonry bit then finishing with countersink. Care needed, as masonry bit really chews off the surface. [2] Perhaps a bit unfair using a small punch to unscrew the front plate of a freewheel, especially starting the wrong way 'til I remebered it was LH!