Laser roll alignment system
RollCheck_Green Status Pro GmbH

What you see is what you get:
The RollCheck® laser alignment system for parallel roll alignment is lightweight, compact and durable. The system can be magnetically attached to just about any size roll or attached with the supplied straps.
We use our proven reflected laser beam technology for maximum angular resolution, thus providing you with the most reliable and accurate visual reading.
The RollCheck® can measure spans up to 10 ft. (3 m) from roll to roll of any size, large or small. A laser line is projected from the RollCheck® transmitter to the reflector mounted on the roll to be checked or aligned.
The laser line projected to the reference line on the reflector indicates immediately if the roll is aligned vertically to the stationary roll. The laser line is then automatically reflected back to the transmitter's reference line indicating if the rolls are parallel to one another. This system is very easy to use; a single person can perform the alignment task in minutes with no training! The RollCheck® comes in its own durable carrying case.