This is a Fusion Firearms Pro-Series grade 1911 part, CNC Machined, 4140 alloy steel, extended “WIDE paddle” Ambidextrous thumb safety for the 1911 style Colt pistols, in Matte Black Oxide finish. With “Wide Paddle” width and Precision CNC machined from 4140 Carbon steel Bar-Stock & heat treated. Some standard fitting may be needed. Will work with all 1911 Colt style pistols, models, clones and sizes. This is a high grade Premium Professional grade Gunsmithing part.