K-BXMOR8155F-AL is a Universal Mortise Gate Box without trim and cylinder hole. This Gate Box has mortise preparation offset. 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.