Nimitz 2nd HDD SSD Hard Drive Caddy for Dell Precision M4600 M4700 M4800 M6400 M6500 M6600 M6700 M6800 Add a 2nd drive to your laptop by replacing your optical drive Mounting screw-holes on caddy provided so you can transfer your original optical drive's mounting brackets to the caddy Comes with a flat Faceplate/Bezel,fits well Works in optical drive bay of Dell M4600 M4700 M4800 M6400 M6500 M6600 M6700 M6800