This may work for some people, but it's unlikely to be useful for me. It is not properly set up for metric markings or metric depth readings. Look at the picture, you will see that there is no way to accurately/easily set the depth in millimeters. The picture clearly shows the 9/32 setting, but not 8mm. Is it 8 or 8.2 or .? The double metric/imperial square should have metric dimensions on both sides of the blade, allowing one side to take an inside measurement in millimeters and the other side in inches. The second side of it only has inches and the other side has the inside. It's like it was designed by someone who knew how to save money but had no idea how to use the tool other than to draw a square line. One can easily imagine the meeting at which this decision was made. For those who just need to mark squareness and draw in inches, this is fine. For me this is not normal as I need metric markings and depth gauges. The finish is a bit rough in one spot so I'll put it down although I don't expect to save this tool. That's a square. 3 stars for accuracy as it seems normal for inches. 3 stars for easy reading - for the reasons above. 1 star for value for money as it has no value for me. perform metric operations as described above, it can be a regular square. As long as you have a file for a rough spot or two.