Tactical Ambidextrous Thumb Safety, Polished Blue. Fits: A thru O Pkg. Includes: Safety NOTE: Specifically Designed for Concealed Carry The Tactical Ambidextrous Thumb Safety will allow your 1911 Auto to be operated with either the right or left hand. This is an essential feature for left handed shooters, but has many other uses including combat competition. Both levers are extended and serrated with the left side being slightly wider than the right. Minor fitting required.