This hook is meant for use as an anchor in an engineered system for firefighter escape applications. The hook is meant to be a part of a system particularly designed by a qualified person for firefighter escape. The user is to be trained in the right kind usage of the system. Forged Alloy Steel is quenched and tempered. The bowl (saddle) of the hook is designed to simply fit around pipes or framework, and the machined tip is rated for full Working Load Limit. This hook was once designed along side members of FDNY as a component of their fire escape system. Meets the necessities of NFPA 1983 for Light-use Auxiliary Equipment and labeled as such.