The Shield Safety Ruler was designed to help with your cutting, measuring and design jobs while protecting your hands and not damaging your materials. Guaranteed straight, these rulers feature solid extruded aluminum with a thick texturized power coat to help grip while using it. The Shield Safety Ruler straight edges are also extra-wide for comfort, safety and accuracy. Its 3mm stainless steel rod in the front helps the blade to glide without damaging the extrusion while its anti-skid rubber inserts on the bottom guarantee a super-grip on the material being cut and protect from damage as well. Shield is ideal for studio, home, shop, school or office.