/ Precision Measuring Tools / Precision Hand Tools / Squares / Special Squares / 13D * Not actual product image 50114 13D Inch Reading Double Square 50114 Other similar products 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 Downloads 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 Type: Drill Grinding Blade Only (for 6"/150mm Squares) Blade Length (in): 3-1/2" Graduations: 64ths 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.