Pro-Series - 1911 Stainless Steel Extended AMBI -TACTICAL Combat Thumb safety for the 1911 Colt style pistol. Matte Finish, Fusion Pro-Series Custom parts are of some of the highest quality in the market today. There is no compromise with these parts. High quality investment castings and CNC machined…NO-MIM. 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.