This is a specially created 3D printed holder for a 9MM laser pointer. The tool fits into the grooves of any diameter multi rib pulley and works with any number of ribs. Just drop the laser into the ribs of any of your pullies and point it at any of the other pulleys to assure that everything is properly lines up when changing accessory b...
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I did not receive a laser holder to set on the pulleys. Just got 6 batteries and the laser in the case