Support your mattress with a heavy duty steel bed frames engineered to support today's thicker, heavier mattresses. A 2-1/2" center support bar offers extra support through the middle of the bed and fulfills mattress manufacturers' support warranty requirements. Four 2-1/2" extra-wide rug rollers (two locking rollers). Two center support glides allow mobitily when desired. Headboard brackets will accomodate virtually any headboard configuration. Finished with a durable and stylish gunmetal black matte powder coating. Features a one-year manufacturer's warranty against defects and workmanship. Easy to assemble in under ten minutes and no additional tools are required. Side rail angle iron steel is 1-1/2" x 1-1/2" and cross arm angle iron steel measures 1-1/4" x 1-1/4". Fits the following mattress sizes: Cal King, King, Queen, Full XL, Full, Twin XL, Twin.