The PowerLine™ sheave alignment tool projects a plane of laser light
parallel with the faces of drive and driven sheaves. Adjustable targets
attach to sheaves, intersect the laser beam and visually show any
misalignment. The Retro-Reflective film on the center line of the target
reflects the laser beam and "glows" for enhanced visibility and
accuracy. The reflective green film shows the laser's alignment line in
"Real Time". This is called "Positive Tracking".