TriggerTech produces a trigger that drastically changes functionality by using a roller. Other trigger designs play with pivots and polishing to try to attain the best break possible. TriggerTech uses patented Frictionless Release Technology(TM) that distinctly improves feel and accuracy. It uses rolling friction leading to unparalleled performance. Drop-in design for lowers with .154" pins (included). *Short two-stage *Curved trigger face *Zero Creep Release provided by Frictionless Release Technology(TM) *Fixed 3.5lb trigger break *Enhanced Reset Control(TM) with sub .030" reset *Hammer, Sear and Trigger are all Stainless Steel and Mfg: Triggertech