Assertion: pruning saw's blade | /r/HasProperty | hardened
Facets:
value: in order to stay sharp
type: PURPOSE
value: well
type: DEGREE
Source sentences:
text: The blade must also be hardened well to ensure that it does not break when cutting metals.
text: The blade is hardened steel with the nice additions of remaining sharp and a non-stick coating.
text: The blade is rugged and hardened in order to stay sharp for fast and smooth sawing.