Putco 29889 Pop Up Locker Side Rails for Silverado/Sierra Features a functional tie-down point that conceals away when not in use Solid die cast construction on the bed rail ends allows for a tie down strength of 500 pounds Easy no drill installation via stake pockets Stainless 1.75" diameter tubes are chromed to 44 hour CASS Tubes and rails are backed by Putco's NeveRust Lifetime Warranty