The object shown appears to be a homemade below-the-hook lifting device. 

Who manufactured it? Has it been tested? Is it safe to use? 

Without proper rated load markings or tagging/identification, this device would not be considered compliant and would need to be removed from service immediately.

ASME Volume B30.20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices, other than components addressed by other ASME B30 volumes or other standards, used for attaching loads to a hoist. The requirements in this volume also apply to clamps used for positioning and anchoring.

Learn more about ASME B30.20 at