K-BXMOR8155F is a Universal Mortise Gate Box with oversized offset. This gate box do not have trim hole and cylinder hole. Blank mortise boxes were designed to accommodate just about any type of stand alone access or push button mortise lock. With a standard side mortise preparation (1 1/16" x 6 11/16") only drilling the mounting holes is necessary on the face of the box. The boxes are wide enough for lever applications.