They fit me perfectly right out of the box, nice box too, I have a Sears Mini Shaper, 7/8hp. I was able to raise them above the minimum mark, after a few test runs found the right height and went to town, I assembled 17 doors in 5 hours. Not as fast as a commercial setup, but not worth the $400 either. I was working with pine so I expected the ends to snap a bit and they might have been perfect for hardwood but my budget required I use what I could afford so it's pine. The sharpness was excellent,, the quality of the bits was excellent,,, check the nuts for tightness,, mine were tight. The product was excellent. Shipping sucks but what do you expect FREE your money back. I'm very satisfied with this product.