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ltc-
Cut with the leading edge, ie forward, not down: the discs will last longer and be less likely to shatter, but cut more slowly.
This holds for battery, mains or petrol and all sizes.
We use whatever happens to be available and I couldn't tell the difference, except for some brand from (I think) the Czech Rep. which weren't all that.
Scilly.Suffolk
Shit in what way? Don't last long, slow to cut or fragile?
How thick are the ones you're using? Are you using the leading edge or the bottom of the disc to cut?
Do they look like this?
Or this?
