/ Precision Measuring Tools / Precision Hand Tools / Squares / Solid Squares / 20-3 * Not actual product image 20-3 Master Precision Square 50130 20 Master Precision Squares Steel Master Precision Square, 3" The Starrett 20 Master Precision Square is the finest precision-checking square. Squareness accuracy to .0001" (0.0025mm) every 6" (150mm). This hardened steel square is 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. 3" (75mm) Blade, 2 3/8" (60mm) Beam. Features Specifications 3D CAD Files / Exploded Parts Diagram Product Testimonials Other similar products 20-1 1/2 Master Precision Square 20-12 Master Precision Square 20-12 Precision Square with SLC 20-24 Master Precision Square 20-3 Master Precision Square 20-4 1/2 Master Precision Square, 4-1/2" Blade 20-6 Master Precision Square 20-6 Precision Square with SLC Contact Starrett Features The finest precision-checking squares - not graduated. Squareness accuracy to .0001" (0.0025mm) every 6" (150mm) 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 Made in America: Yes Blade Length (in): 3" Blade Length (mm): 75mm Beam Length (in): 2-3/8" Beam Length (mm): 60mm Material: Steel 3D CAD Files / Exploded Parts Diagram Login to see related product files. Or create an account. Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements.