Review (5/5): Crazy If You Don't Buy Them
The Gist of it: This replacement blade set (2-hole) revitalized my Wahl adjustable clippers purchased at a certain big chain box store back in 2000. Definitely worth the cost, as opposed to buying an entire new clipper set.
As other customers have noted, it does take a bit of patience to align the blades and keep them that way while tightening the screws. However, it is far from rocket science. As at least one other customer noted, I also had to use my old screws as the new ones would not thread properly.
As long as your Wahl is USA made, and has two screws in the blade head, then these should be okay. I dare you to try it. It's kind of fun and you may just find yourself adjusting your blades routinely. I know I do now.