Center Mark Magnetic Drywall Cutout Tool for Recessed Lighting Perfect for first-time DIYs, the experienced handy person or those who do drywall infrequently, the patented Center Mark recessed can-light locator uses powerful rare-earth magnets to help you accurately locate and cut perfect light fixture holes in drywall with no measuring required. The Center Mark can be used to cut out 4 In., 5 In., and 6 In. recessed light fixture openings. Eliminates costly measuring errors, keeps wasted drywall sheets out of landfills and improves your productivity.