Ready-to-drop-in parts put an ultra-smooth, clean breaking, professional quality trigger job in your 1911 Auto in only minutes. Fully prepared hammer and pre-ground, pre-polished sear, plus springs and fully-machined disconnector, will install into most models of 1911 Autos with little or no fitting required. Helps promote better trigger control and improved accuracy. Pro Match - features wire EDM'd hammer and sear that are double heat treated, then finish ground for outstanding durability - 3 1/2 lb. pull weight. Commander Match - Carry Defense Style! A professional 4 lb. trigger pull. Mfg: Nowlin SPECS: Kit includes hammer, sear, sear spring, mainspring (hammer spring) and disconnector. Pro Match - Stainless Steel, Rc 50. Commander Match - Stainless, Machined tool steel hammer, polished sides, Rc 50.