Review on Woodworking Measuring Multi Function Carpenters Architects by Raymond Gray

This part seems to work, I was under the impression that it was aluminum rather than hard plastic. I didn't read aluminum but it was among similar products that were aluminum. I have other plastic gauges so I should be fine as long as they hold the profile at a 90 degree angle. One side is not quite 8 inches long and the other side is 6 inches long and 2 3/4 inches wide. I'm sure it will come in handy in my passion for woodworking. It has many usages but no instructions included.