¾” Deep Dust Cover for Hardware Preps on Hollow Metal Frames

This ¾” deep dust cover—also known as a cavity protector or hardware prep insert—is designed to shield hardware preparations on hollow metal door and window frames. Ideal for deeper cutouts, it protects hinge preps, strike preps, lock cutouts, and other frame cavities from dust, debris, and impact damage during construction or transport. A go-to choice for door manufacturers, glaziers, and contractors seeking to maintain cleanliness and integrity during frame installation.