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Message: <blockquote data-quote="duff daddy" data-source="post: 660507" data-attributes="member: 10730">Originally when they were made, the lenses had a "box" that was used for alignments, some shops still use them. It is or alignment purposes but now an easy way to align headlights is to measure with a meter stick, to the center of the head light, then 15 ft in front the same height and cross width and your golden on a board. this is your "mystery" tool<img src="http://rds.yahoo.com/_ylt=A0WTefN.60tLDkgB_hCjzbkF/SIG=128prjqe8/EXP=1263353086/**http%3A//www.canbuilt.com/images_thumb/OPT-5405NEW.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>