The Rize 575 rails can be used for a twin or full size. The side angle iron is 1.5", and all of the steel in this frame is very strong domestic recycled railroad steel from Jersey Shore Steel. These rails are designed to be bolted onto a wood or metal headboard and footboard (bolts are not included). We do recommend to use a good reinforced slat network with these rails for proper foundation support.

Warranty: Limited Lifetime.