Here we introduce AB hinge link. AB hinge link is a matching combination of A-type hinge and B-type hinge. It is a key adjustable connector of seismic support and hanger. It is manufactured according to GB/T 37267 and GB 50981 standards. It is used for the single axis rotation connection between diagonal brace and C-type steel/structural substrate. It can flexibly adjust the installation angle (commonly 45 ° slant support) to absorb horizontal displacement and vibration during earthquake.