3D Printer Laser Holder. Improvedbr br To attach a Laser with a Heat Sink to a 3D Printerbr br Do NOT us gorilla glue!!!br br It has air gaps to allow coolingbr br Allows for adjustmentbr br This is just a fastening for a Laser with a heatsink.br br It uses the larger threaded hole on the back of this Laser heat-sink which is the same as a tripod mount 14" No.20 thread Whitworth x 34" (20mm) and a washer is recomended.