1911 Ambi Thumb Safety, Pro-Series - 1911 Steel Extended AMBI-TACTICAL Combat Thumb safety for the 1911 Colt style pistol. Black Oxide Finish, The weak side of the ambi thumb safety is retained by the included sear pin, therefore ambi style grips are not needed. Fusion Pro-Series Custom parts are of some of the highest quality in the market today. They are made for high-end and High quality 1911 projects. The tactical parts are thinner at the thumb paddle to allow for a thinner pistol profile for carry and holstering. Some fitting will be required, as with any safety Will work with all models of 1911 Colt style pistols and clones.