These bits came in a nice hard shell case and the bits looked to be well made till I used the 3/4 inch size bits to drill two hole in my steel off road bumper the first hole cut through without any problems but when I went to drill the second hole it just spun with out cutting the hole, one use should not dull the bit but it did. I ended up having to use a different size to get the second hole drilled and I decided to send the kit back very disappointed for a nice looking kit that was not up to a small job.