laser line for leveling and projecting a toe line for darts
this unit is placed on the dart board before it is hung and projects a line that hits the angle of where the floor meets the wall as the user raises the board up the wall. This tells you the proper height. Then the laser is set to the second position which projects the toe line.
exploded view
toe line - rapid prototype
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laser line for leveling and projecting a toe line for darts