/ Precision Measuring Tools / Precision Hand Tools / Squares / Solid Squares / 55-3 * Not actual product image 50279 55-3 Master Precision Square with beveled edges 50279 Other similar products Starrett 55 hardened steel squares are the same as the 20 squares, except that the blades are beveled on both edges of each side, which provides an excellent visual line contact with the work. 3" (75mm) Blade, 2 3/8" (60mm) Beam. Features Specifications Downloads Contact Starrett Features The finest precision-checking squares - not graduated. Squareness accuracy to .0001" (0.0025mm) every 6" (150mm) The blades are beveled on both edges of each side, which provides an excellent visual line contact with the work. These hardened steel squares are used when extreme accuracy is required. The beams and blades are hardened, ground and lapped to ensure parallelism and straightness. The beam is grooved at the inner corner for clearance of burr or dirt. Made of high quality tool steel, with the finest of craftsmanship throughout. Specifications Blade Length (in): 3" Blade Length (mm): 75mm Beam Length (in): 2-3/8" Beam Length (mm): 60mm Material: Steel Downloads Catalog 33 - Section 11 - Squares Invented by our founder, the combination square was our first product and today, our brand is considered to be the best available. This section offers a range of high quality solid squares, tri-squares specialty products and accessories that is especially broad and deep. Precision Hand Tools (Catalog 33) 612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.