Heavy gauge construction sets the standard for strength and corrosion resistance. 1/8" thick commercial-grade aluminum alloy. Sliding trays with dividers in most pickup boxes. Inbed boxes for flush with bed rail requirements. Sliding trays with dividers. Continuous stainless steel hinges. Positive control, stainless steel T-locks. Durable gas struts. Automotive quality seals. Full, continuously welded seams and joints. 5-year limited warranty.