Cylinder and Slide Ultra Match Disconnector Positive Reset for Fast Double Taps. Manufactured from the same tough steel alloy as the Cylinder and Slide Hammer. Proper length above and below pivot hole to provide correct function with light trigger pulls and to reduce drag on the slide. Heat treated to 42-44 Rockwell C for unlimited life expectancy. Excellent for match and tactical pistols. Fits all 1911, STI 2011, and 1911 Hicaps.