The laser beam enters the 90-Line through a port in the front and exits from a side port at precisely 90° to the incoming beam. Internal optics let operators place the device anywhere along the laser path and establish precise right-angle references. The device checks the parallelism of slides, rails, machine tracks, rollers, and shafts. A locking mechanism handles preset positions, and a friction lock holds the beam in place. The housing is machined from solid aluminum and has a hard anodized coating.

Pinpoint Laser Systems, 3 Graf Rd., Newburyport, MA 01950, (800) 757-5383,