Because it became 6DB-60 for item number. I thought that 60 mm across the board and ordered it. The product came and noticed the small things, and when looking closely it was 17/8 inches. Although I have this mistake, I want you to display the opposite side in millimeters. In the impact socket, the important thing is, first of all, I think that it is the insertion size and the opposite side dimension. If you can arrange a lot of information that you do not need and display the necessary information in inches only and unkind, you want to change it clearly.