Shallow Metal Box - Ceiling Fan Electrical Boxes 1:made with a versatile combination head screw 2:labor-saving installation ApplicationThese switch boxes are used to support toggle switches,duplex devices,decoratives and a veriety of electrical outlets. 4"SQUARE BOXES 1-1/2" DEEP sizeCAT No.knockoutsizebottomthicknessS1501012-1/2"5-1/2"1.0MMS1501212-1/2"5-1/2"1.2MMS1501512-1/2"5-1/2"1.5MMS175108- ...