Then bore into the plywood and through the hole behind it.
Make lock hole bigger in metal door.
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How to cut a hole for a door knob in a metal door.
Cut two pieces of scrap plywood several inches larger than the diameter of the hole.
Mark the center of the existing hole on the edge of the door.
Clamp a piece of.
Take your time so you keep the.
Then mark centerlines on the plywood block.
Draw a center line on the plywood and mark setback of the hole from one edge of the plywood.
Mark with an x the center spot for the doorknob hole on each side of the door.
The plywood will hold the pilot bit on track until the saw starts cutting.
Drill a pilot hole with a inch bit straight through the door.