4 in round 1/2 in deep, pan boxes with (5) 1/2 in conduit knockouts are used to mount ceiling, and wall lighting fixtures when a shallow depth box is required. Their versatile combination head 8-32 screw can securely fasten fixtures to electrical junction boxes using a slotted, Phillips®, or Robertson head screw driver. GARVIN® Pan Box, (5) Bottom Knockouts, (5) 1/2 in Bottom Knockout, 4 in Diameter, Round Shape, Steel, G60 Galvanized, 1/2 in D Dimensions