Blends beautifully with the 1911 Auto slide. Hidden recoil shoulder prevents shoot-off. Your 1/2", center-cut end mill makes the necessary cuts, no dovetails. Tri-Set – Slotted cam selects three pre-set positions for fast elevation changes. Mfg: Aristocrat SPECS: Blued steel, satin finish. Body – 2.2" (5.6cm) long, .700" (17.7mm) wide. Blade – .874" (22mm) wide. .432" (11mm) high. Notch – .11" (2.8mm) wide. Use approx. .215" (5.4mm) high front sight. Installation requires milling of slide.