MULTI s loggia o s Machinery Drywall Cu Tout Tool Model 8115 Tracing Lines for All Two One Locator Rare-Earth Magnets Perfect Drywall Cutouts With NO Measuring! Great for first-time Yids or experienced handy persons, Mufti Mark electrical outset locators help you accurately locate and cut electrical outlet access holes in drywall, Sheetrock, paneling and other materials with no measuring. Mull Mark can be used for any electrical box — standard rectangle, octagonal or round.