The purpose of this alignment tool is to fix the poor quality of Omtech's laser alignment tool.

Omtech Laser Alignment Tool

Mine arrived severely misaligned, and what was supposed to be a laser dot was instead a 2x4 mm rectangle.

This alignment tool is designed to fit into a 24 mm laser head tube (inside diameter). The output laser beam hole is a 1.1 mm circle, ensuring the beam is perfectly round.

Happy (reverse) calibrating! =)