Abstract: This application describes a device for making where to locate and to cut the opening for a utility box, windows, panels or other openings on a sheet of building material. This marking device comprises a metal wire mesh screen mounted to or within a rigid peripheral frame and a magnetic template, which mimics the size of the opening to be cut or the object to be measured. This template is magnetically or removably attached to the planar or flat wire mesh screen and aligned with a mounted utility box. Once the flat magnet or template is appropriately placed on the first surface or area to be measured, the marking device is placed upon the second surface or on the sheet of building material (including without limitation plywood or drywall), and the user can trace the location of the opening to be cut using a pen, pencil or other marking implement.