Nimitz 2nd HDD SSD Hard Drive Caddy For Dell Latitude E6440 E6540 with ejector 9.5mm-High,LED Available,Built-In Eject / Lock Mechanism,Comes with matched Faceplate/Bezel The hard drive attaches to the caddy from the side using long screws Works in E-Modular Bay of Dell Latitude E6540 E6440,Precision M2800 Not compatible with older DELL E Series laptops. We have a different caddies for the older generation E Series laptops. Please email us if you need assistance in locating the correct caddy for your Dell laptop model