Use with HANS devices which set up for post clip anchors, containing the metal clasps at the end of the tether instead of the sewn loops for quick clip attachments. For use with SA helmets not containing a built-in M6 nut washer. Fully SFI compliant, though FIA standard 8858-2010 only approves helmets with the nut washer built into the helmet, making use of these anchors not FIA compliant. The professional HANS post clips have aluminum bases and are sold as a pair for one helmet. Silver color. Other colors available as well.