Great item. The alignment was a little off, but a quick jaunt to the anvil in the shop with a small hammer and a bag, and after a few light taps here and there everything was lined up correctly. I am also happy to give the offset edition 5 stars because of the price and the solid product. My use is in robot positioning projects in small shops rather than heavy industry. For this application (light work) this is the right product at the right price. I started a project based on the old imperial system (inches etc) but found the support blocks there to be large, bulky, heavy and very expensive. . I switched to metric and found these parts and couldn't be happier.