The blade with the hardy edge for mowing the woodier and more fibrous vegetation.
The steel in this blade is more hardened than in the normal grass blades and the bevel is not so fine so is therefore stronger.
Good for blackberries, docks, bracken, thistles and can be used on thin tree suckers, but watch out once you get into larger, woodier material as there is a chance of breaking the snath.
BUBL50