Horrible QC on these blades
343925
Wife bought these for my birthday.  Horrible QC on these blades.  The inside and outside blades are different diameters and leave a stepped bottom.  Put in a chipper and now the bottom of the dado has 3 steps.  Laughable.  It's going back.
1832892
Out of the box they were streaking and skipping. I've been using this type of blade for years and it seems like here letting the quality go.  Contacted customer support at rain-x and they never returned my messages.
883633
The blades were in a different configuration (not like the picture show here), and as a result they were non-functional.
1150906
a perfect fit on my dewalt, the quality of the bi-metal blade is horrible.  I went through three blades cutting 2 nails and a screw.  Put on an old blade from dewalt to finish the job.  Horrible quality
3793075
The blade was worse then the one I thru away.
Reva Bochner
Unsatisfied
I will never buy this product from you again
591940
Bladed looked fantastic, until further inspection...Blade has 1  " crack down back of blade. Hasnt even cut a piece of paper yet.. Was expecting a quality hand forged blade and that is not what I recived.
679144
Received three BLACK regular blades, not the Premium white blades!  Had to send them back for a refund.
2149174
I bought these knives for my Ridgid TP13002 based on other reviews and I hoped for the best but got the worst. The double bevel was terribly ground on the edges. The actual cutting edge bevel was wider on the ends than it was in the middle which made the ends of the knives narrow and the middle wider. If I had put them in my planer rather than return them the result of a  planed 13 inch board would be a cupping effect in the middle of the board which defies the purpose of having a planer since a planer is supposed to fix a cupped board not cause one. I've included pics of the knives on my perfectly flat jointer in feed table. If you look at the bevel you'll see what I mean. The other pictures are the knife standing up on the edge against my jointer fence. The picture with the most light under the edge is because I'm pushing down on the opposite end. Both knives were like this. It's as if they let the knife flex in the middle while the grind was being applied. The original Ridgid brand knives showed zero light on the same jointer table. I'll pay the extra eight bucks for the originals and won't bother with Powertec again.  Another reviewer had the same problem so maybe I got his return. Sorry the pics are sideways. I can't find anything in the editing to fix this.
3061243
These blades were a total waste of my time and money.  After less than one month's light to moderate use, I had to turn them.  The second side is already leaving ridges. I've had my planer for more than 10 years and tried many blades.  These are by far the worst. Sorry that I bought 2 sets...
738218
Not really "German Grade". There are gaps between the blades and don't seem to be high quality steel. Maybe I just got a bad pair.  I will post pics later.
2935902
The price was too good to be true. The packaging should have been the clue. It wasn't typical packaging. It was repackaged and the blades were recycled. After using them for two or three cuts they began skipping and had to be replaced. I finally gave up. Not all of them were Olfa either.
3541940
Initially I was happy with these blades as they were quiet and seemed to perform well.  I was optimistic after spending almost $20 each for these blades at the local parts store (I know they are cheaper on Amazon).  One would think with advances in materials and manufacturing techniques  that they would actually be better but they are not.  After only about 6 months of use they started streaking and it almost looks like there is an oil film on the windshield.  I thought perhaps I got something on my windshield but after thoroughly cleaning the windshield and blades the problem persists.  I even wiped down the blades and windshield with alcohol to no avail.  I put my "old 1+ year old OEM blades" on and the problem went away.  It seems that once the "coating" on the blades wears off they are virtually useless.  Six months life span is completely unacceptable to me.  I can remember getting a year out of the old $4 blades back in the day.

For almost a $40 investment I would definitely look elsewhere.  Go with a silicone based blade if you are spending this much.  Otherwise you might as well buy the cheapest blades you can if they are only going to last only 6 months.  Stay far far away from these or just save your money and buy some "el'cheapo" blades that will last just as long.  Bosch got me once on this and it will never happen again.  I will never buy another Bosch wiper blade again.
4686116
Just got my replacement blades. They seem to be decent blades. The only thing I can say is that I wish they marked which blade was A and C on the blade itself. Unless I'm missing something.
3514390
These are obviously not checked before leaving mfr facility.  The one I received is impossible to correctly position the cutter.  The cast body was not accurately machined at the mouth/throat, so the blade cannot be adjusted to an even depth, i.e. high on one side.  Will have to try to correct with a file.
349853
I do not find these to be the quality they claim.  Nothing is worse then doing you piece cutting and finding that the blades did not cut clean.  I have used two out of the 5 blades and would not purchase them in the future.
3472525
Low quality steel blades that have been poorly polished. The low price is the only reason they got three stars.
3256991
I have made the mistake of not trying to use one of these blades immediately.  They are NOT Olfa, but someone has got a bunch of old dull blades, run them through a sharpener and are selling them as "NEW".  They have a "nick" in them so they don't start cutting clean from the onset; only to be followed by getting so dull they are useless within hours of use.  DON'T WASTE YOUR MONEY.  I am out $45.97.

Lesson learned:  Bargain 60 mm rotary blades are the same as your buying a blade sharpener and sharpening your own.  They are definitely inferior from actual new Olfa blades.