Buyer of this key I've assumed that the right size for my drilling is. Unfortunately, it was not the case, because I need a 8mm spanner (or 16mm rotary cylinder) for my drills. Then I looked up again on the product page and it was not the exact sizes specified, but only "chuck for 4 sizes," so it would be nice to customers better to point out, because I thought that the proper key in 4 sizes sure this is (at least I have the same for 2 different drills keys, so I thought to myself that it this is not there so many different sizes and I can therefore count on it that the key fits.) Otherwise, the keys feel quite stable.
