Let me preface this review by sayin that this is the only extension for my table saw (Skil 3310) that I was able to find. I am a novice woodworker at best. The 3310 is an entry level table saw, which is pretty good for the money (another review...), however the table surface is small, so I needed an extension.
Enter the 80089 extension kit. The holes don't line up with the holes on my saw. This bothered me a little, but not enough to go through the process of sending it back, especially since there were no other alternatives available. I drilled holes to match the ones on my saw and attached it with the provided screws and washers.
Much to my dismay, even after attached, the extensions angle upward, creating a surface that isn't flat. The extensions are extremely flimsy, which in this case was helpful, because I was able to bend them down enough to make them somewhat usable.
I gave the product 2 stars because there was nothing else available, and I figured it was better than nothing...