1965-70 Chvy Imp Frt Drum Brake Anchor Bolt Pin w Butterfly Guide Plate PAIR OERThis 1965 1970 Chevy Front Drum Brake Anchor Bolt Pin with Butterfly Guide Plate is a reproduction of the original GM part. This kit is sold as a pair. The original anchor bolt used a 15 16" hex head while this set uses a 1". There is no functional difference but these are sold as a pair so as not to be confusing if you purchased only one.