These bits look and work fine but the case they come in has a serious fault. The bits are stored in a metal case with a hinged compartment. So the bits are easy to remove and replace, but the design flaw is that you can't see the markings from the second to the last level as you go to smaller numbers and larger bits. So you're forced to remove the bits on one of the direct layers so you can read the labels and get the correct bit. It seems like this should have been noticed and addressed before this set came out, but it isn't and it doesn't speak volumes to the quality and attention to detail in this product.