The Concord Baby Bed Rails for Vermont, Brayden and Alton Cribs convert your crib to a full-size bed with ease. Matching side bed rails attach to the headboard and footboard of your crib using a simple hook on system. The pre-installed hooks on the conversion kit rails attach to the embedded metal pins in your headboard and footboard. Crib-to-bed conversion rails come with all the mounting hardware needed to complete the outer bed frame.