A template system for guiding drywall cutouts has at least one control box incorporating a stud-finder, and a system of interconnecting extensions attached to the control box, the extensions forming a predetermined geometrical shape. The template system is characterized in that, with the template system positioned against a drywall, individual edges of the interconnecting extensions serve as guides for a cutting tool to cut out a portion of the drywall in the predetermined geometrical shape formed by the interconnecting extensions.