These M85/M92 Drop-In Peep Sights were designed to improve the shooting experience of the Yugo M85/M92 pistols. They will have the exact same center(s) as the factory blade and do not require any drilling, grinding, or welding to install. On the V-Notch Peep, you will have a Battle Peep as your primary, and a V-Notch Peep as the secondary. Both Peeps will have the same center as the Battle factory blade setting. The V-Notch Blade was designed with a vertical channel for the end user to color-fill to their preference.