ONLY 16 SETS AVAILABLE. Contains New Colt Series 70 hammer, C&S match sear, C&S match disconnector, C&S light pull sear spring, 18lb. hammer spring. I personally stoned the hammer hooks and tested each set in a 1911 government model. I set the trigger pull at 3 3/4 - 4lb. crisp on all sets. These sets will only work on 1911 pistols with the standard grip safety. They will NOT work if you have a beavertail grip safety. The trigger pull may vary due to sear/hammer pin placement in your frame. Bill Laughridge