Devices methods, and systems for facilitating the installation of an item to a structure, and including for installation of doors and windows, and in particular for plumbing and/or leveling door/window jambs is provided. The devices may be used for facilitating the alignment of door/window jambs even before shims are installed. The devices may be adjusted to fine tune the installation. When the desired level of adjustment is reached, the jamb may then be permanently installed.