INCOM’s placard holders are manufactured out of high quality aluminum with astainless steel clip to ensure longevity even in the worst conditions. Placardholders have 10 pre-drilled mounting holes for ease of installation. Holder hasa formed ramp at the clip to guide placards easily over the clip duringremoval. Back plate has several raised bumps that keep plastic placards frombecoming stuck in the holder during winter weather.Department of Transportation (DOT) is focused on the prevention of incidentswhen dangerous goods are imported, handled, or offered for transport.Placards are displayed on vehicles and tanks to identify the risk of productsbeing transported. Shipping labels are essential for packages that containdangerous goods. All product manufactured to Department of Transportationspecifications.These products are intended for DOT dangerous goods transportationidentification within the USA. High Quality Alumium Painted White Stainless Steel Clip 10 Pre-Drilled Mounting Holes Easy Installation