With ABUS security bolt locks, the locking boxes typically accommodate the extended bolt on the right and left sides of the door. In cases of poor or tight structural conditions, the bolt can alternatively be recessed into the wall. To do this, a rectangular opening must first be chiseled out of the wall, into which the wall hole cover is installed and securely fastened together with the wall cover plate. This way, the ABUS security bolt achieves a clean and secure wall integration.