The HD Night Sights were specifically created to address the needs of tactical shooters. The three dot green tritium night sight set's front sight features a taller blade and an aiming point ringed in photoluminescent paint while the rear sight is outlined in black and features a wider U-shaped notch. This unique configuration increases visibility and quickens front sight acquisition - even in transitional lighting. Additionally, the front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation. Fits Sig Sauer models calibrated for 9mm and .357SIG, and pistols that come factory standard with #8 Front/#8 Rear including P225, P226, P228, P239, and P320 (excluding P938 and P365).