Hubbell Raco 4 in. Round Ceiling Rated Box, 2-1/8 in. Deep, Three 1/2 KO's, for New and Old Work (4")

No protruding ground screw or fan mounting screws allows easy installationMetal protection plate eliminates debris or damage to wiringSetback tab allows for easy installation of different wall thicknessNew work applications rated at 150 lbs. Old work applications rated at 70 lbsSupplied with three 1/2 in. knockouts#10-32, 1 in. long ceiling fan screws provided and provision for #8-32 fixture mounting screwEasy to follow instructions and mounting hardware included