/ Precision Measuring Tools / Precision Hand Tools / Squares / Special Squares / 13D * Not actual product image 13D Inch Reading Double Square 13, 13M Double Squares with Hardened Blades Reading Double Square, Inch, 3-1/2" Starrett 13 squares are very popular with machinists, toolmakers, and patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square. Drill Grinding Blade only (for 6"/150mm Squares) square. Features Specifications 3D CAD Files / Exploded Parts Diagram Product Testimonials Other similar products 13A Inch Reading Double Square 13C Inch Reading Double Square 13D Inch Reading Double Square 13MA Millimeter Reading Double Square 13MC Millimeter Reading Double Square Contact Starrett Features Drill Grinding Blade Only (for 6"/150mm 13 Squares) Beveled to 59 Deg for drill grinding on one end and 41 Deg (the cutting angle of countersinks for machine screws) at the other Both ends have quick-reading 64ths grads. and the graduation is located to measure perpendicularly to the axis of the drill By reading the graduations, the center point can be easily and accurately located Specifications Made in America: Yes Type: Drill Grinding Blade Only (for 6"/150mm Squares) Blade Length (in): 3-1/2" Graduations: 64ths 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.