The Griffin Adjustable 2-Stage Match Trigger is a Milazzo-Krieger style adjustable two stage trigger combining a mil-spec 62RC 8620 trigger material and case-hardening heat treatment regiment with a 53RC 440C tool stainless disconnector, and 53RC 440C nickel teflon coated tool steel lightened speed hammer.These triggers are pre-adjusted from the factory and feature adjustable over travel and disconnector engagement, allowing end users to get the refined feel that they want if the standard adjustment isn't perfectly suited to their taste, or if their lower is differently toleranced than our fixtures.What's in the Box 62RC 8620 Trigger 53RC 440C SS Disconnector 53RC 440C Nickel-Teflon Coated Lightened Speed Hammer Adjustment Allen Wrench 1 Hammer Spring 2 Trigger Springs (User's choice of 4.5 lbs or 5.5 lbs - the 4.5 is installed from the factory) 2 Dimpled Trigger Pins