An energy-absorbing deformable structure to attach a child safety seat to a mounting portion of a vehicle comprises a bracket. The bracket includes a base configured to be coupled to the mounting portion of the vehicle, a metal strap positioned in the base such that a first end of the metal strap is configured to be free and coupled to the child safety seat, a second end of the metal strap is separably attached to the base, and a body of the metal strap is bent between the first end and the second end. When the metal strap is pulled in tension, the metal strap tears from the base, thereby absorbing energy.