One frame adjusts to be used with Queen, King or California King size bedding automatically without measuring or mistakes and no tools are required for assembly. The LB66 lowers bedding 3 1/2 inches, making it easier to get into your bed. Made with heavy duty offset headboard brackets with additional slots to fit more headboard widths. Includes glides that dsitributes the weight of the be over a larger area and allow the bed to sit firmly on the floor.