Style QC1. Used in conjunction with The 'Cooler Bleeder and the Series 2 Adapter. This inserts into the factory bleeding port found in many Chevrolet and Cadillac vehicles.  Used in place of General Motors / Kent Moore special tool GE-52079-10 and GE-47716-20.  See Connection Chart for exact fitments. 
 
Delrin fitting available as an upgrade.   Delrin is a high strength plastic with extremely high wear resistance.  We suggest the Delrin material for anyone frequently using the QC1 plug such as shops, commerical use, or enthusiasts who are bleeding all their friends vehicles!
 
Note:  Hand assembled in the USA, there may be cosmetic tooling marks on plug from assembly.