The blades tended to bend and distort when subjected to heavy cutting. The tempering of the metal is suspect. Good tempering should produce a blade resident to bending and not easily distorted. I experienced immediate problems with both sets. The blades needed to be straightened after first mowing. One blade was bent two inches and took considerable reworking to be usable again. I consider my application as extreme as I use the mower on field type mowing. I recommended these blades for level golf course type lawns which these blades are likely intended for use on.
These blades are just a bit shorter than my original blades. So they will leave strips in heavy grass. But in the defence of the blades, they are not a direct replacement for my model of mower.
fit very well and finish very well. they sit deeper in the mower deck, allowing the deck to be lowered more for better suction to cut / expel the grass, but not cut any shorter than the other blades. more like oem.