WAHL Deluxe Pet Electric Clippers Lot of 3 Units Case Combs Scissors Accessories

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WAHL Deluxe Pet Electric Clippers Lot of 3 Units Case Combs Scissors Accessories
Here's the story on these. All were purchased brand new, I didn't keep the hard cases the red ones came in. Used them on my dogs, they worked fine. Once the blade dulled I tried replacing it with the new correct blades (see empty pack). I couldn't for the life of me figure out how to get them to cut again after I installed the new set of blades.  So basically it's probably just installed wrong.  I bought the second pair and those blades got dull so I didn't attempt to replace the blades that time because I just went ahead and bought another. Now I have all these perfectly fine clippers that I cannot use because the blades are dull!  There's absolutely nothing wrong with the motors on all of them.
The last picture shows the red unit that I tried putting new blades on (the new blades were !). So basically, all the units work perfectly fine but won't cut the hair because of the blades. If you know how to make them cut again, you'll have 3 good clippers! My stupidity is your gain LOL. I don't need all of these, I have a new clipper now (again). Non-smoking home.