What is the typical measurement range for the exit hole bored by an emerging adult deathwatch beetle?

Answer

1.5mm and 3mm in diameter

Adult deathwatch beetles bore exit holes to the surface usually measuring between 1.5 millimeters and 3 millimeters across.

What is the typical measurement range for the exit hole bored by an emerging adult deathwatch beetle?
foodinsectwoodDeathwatch Beetle