New Machinist Square. This is a new machinist square milled to perfection. This square is at an exact 90 angle. Perfect for sharp corners, centering stones and a wide variety of other uses. It measures approximately 3" (76 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.