2 Machinist Squares For Sharp Corners & Centering Stones. This is a new set of 2 machinist squares milled to perfection. Great for sharp corners, centering stones and a wide variety of other uses. These squares are at an exact 90 angle. Each measures approximately 4" x 3" (101.6 x 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.