Chief's PACHFK1 is designed to support Chief's PAC501 in-wall solution by eliminating the need to install a standard wood header and footer. Easily installs between three 16" center studs with center stud removed. Reduces PAC501 installation time. All hardware included. Provides a solid support structure, which eliminates the need to frame around the PAC501 with 2x4 studs. Provides knockouts for simplified electrical wiring.