The plywood will hold the pilot bit on track until the saw starts cutting.
Make lock hole bigger in metal door.
When enlarging a lockset hole mark the centerlines of the old hole on the door.
Mark the center of the existing hole on the edge of the door.
Take your time so you keep the.
Drill a pilot hole with a inch bit straight through the door.
Clamp a piece of.
Draw a center line on the plywood and mark setback of the hole from one edge of the plywood.
Place the template that comes with the lockset on the metal door.
Then bore into the plywood and through the hole behind it.
Mark with an x the center spot for the doorknob hole on each side of the door.
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To overcome this problem fasten a piece of 1 2 inch plywood over the existing hole.