Steel Access Door 18" x 18""KARP" STEEL ACCESS DOOR The Press Fit door is a unique lightweight door that installs easily by bending the tabs on the return back to grip the drywall. The frame, return and doorstop are one piece construction with a beveled frame resulting in an attractive finished look. 18" x 18" Steel Access Door. WARNING: This product contains chemicals including silica, which is known to the State of California to cause cancer. www. P65Warnings. ca. gov.