Model Number: 7261ASE Brand: Mayline For architects, designers, or engineers Mayline parallel ruling straightedge bar has a durable black laminate base where a transparent blade is inset for see-through registration and fine line quality. Mayline Armor Edge straightedge parallel rules incorporate metal rollers which alternate the full length of the straightedge and allow the straightedge to ride smoothly over the surface of the drawing. The Armoredge is a nearly invisible protective strip of 8 mil. stainless steel that is applied to the leading edge of the Mayline® straightedge to resists nicks and dents from drawing tools and cutters. Features: 36"L Straightedge Parallel Rule with ArmorEdge Protective strip of 8 mil. stainless steel that is applied to the leading edge Professional Quality Retractile ball-bearing rollers The rollers come in chrome-plated brass Transparent Blade Above-board mounting hardware included Unused -Still in box - never taken out of box