The Buyers Bolt-On / Weld-On Mount Carbon Steel Round Light Box is the perfect solution for mounting 4" round DOT lights. Constructed from durable carbon steel, this light box is designed to withstand the toughest conditions. It is ideal for use with snow plow lights, truck lights and trailer lights. This light box is sure to provide a secure and reliable mounting solution. FleetPride is your First Click in Heavy Duty®.