Have a working pair of 22.5" Laser Light Curtains for installing in front of your CNC Router to prevent someone from walking up to it and sticking their hand in it while it is running. These have 64 small lasers diodes in them that create a cross hatch pattern across 6 feet of space and if anything breaks the beam it triggers the safety circuit to shut off the machine. Buyer will need to wire up that part to their install.