Always use a sharp drill bit and relieve chips as you drill by pulling the drill out of the workpiece as it’s running to spin off excess wood chips. Do not apply much pressure while drilling, especially at the end of the hole. Holding or clamping a sacrificial block of scrap wood against the back of the door while you drill is recommended for extra protection against blowout. In most cases, the screw head covers any minimal blowout. In extreme cases, where a screw head would not cover minimal chipping from the exit of the drill, users will drill the hole halfway with a standard drill bit, then use a tapered drill bit to finish the hole. To prevent drilling injuries, always be aware of where your hands are positioned.