The Kensington Security Slot has been incorporated into thousands of devices by engineering and design teams. For over 25 years designers and engineers look to incorporate the industry standard physical security features that Kensington has developed providing peace of mind for companies, professionals and consumers. When using Hole Callout to dimension a slot in SOLIDWORKS 2009 or later, this is the type of dimension that is inserted. Method (b) The third method (c) provides the width and overall length of the slot in linear dimensions. Palm springs casinos. This method is preferred if the slot has positional tolerances that use the boundary method (see ASME Y14.5M-1994 figure. Standard DIN Rails are available in 35mm (7.5 and 15mm deep), 32mm and 15mm widths and are supplied in 1 m (3'3') and 2 m (6'6') lengths. Magazine size mail slot overall dimensions are 13' W x 3-1/2' H. Rough opening dimensions are 11-1/4' W x 2-1/2' H. Include an 11-3/8' W x 2-3/8' H spring loaded flap. Include 2 pieces - flap for the front of a wall or solid door and inside trim for the rear. Feature a durable finish available in antique, brass and chrome. Made in America.