BullsEyeBore Laser Drill Guide

The BullseyeBore Laser Drill Guide attachment may look simple, but it’s designed to ensure you’re always drilling on target. This is made possible by projecting a series of circular measurement patterns onto the work surface, letting you easily identify when things are out of alignment, and it also serves as a depth indicator. Continue reading for a depth indicator video demo.

“As you go deeper into the wood, the outer circle will get smaller and smaller until it eventually overlaps with one of the two smaller inner circles. The distance this indicates is proportional; the change in the outer circle’s diameter is equal to the distance the drill bit has gone down. But you don’t just have to eyeball it. You can use the inner circles as a frame of reference,” reports Popular Mechanics.