This Pro Cargo System bracket secures two (2) Wolf Pack Pro SBOX031's (sold separately) to the side of the Pro Bed System and Pro Bed Rack Kit. The SBOX031 is side-mounted, allowing quick and easy access to all your adventure gear while keeping it safe from the elements. The brackets are adjustable from 1415mm(55.7'') - 1555mm(61.2''). Made of high-strength steel and sealed with the same durable, weather-resistant powder coating as the Front Runner Racks. The top and bottom latches are lockable with a RRAC134(sold separately), preventing unwanted access. These brackets are suitable for Wolf Pack Pro SBOX031's when when fitted with the Wolf Pack Pro Hi-Lid SBOX062. No drilling is required for the installation of these brackets. Note: This Twin Wolf Pack Pro Cargo System Bracket is not compatible with the PBFR001S or the PBFR001T.