I don't know if it was intentional, but I got 2 drive caddies in my order for the price of one. They are plastic and snap neatly on a standard hard drive. Plastic pins fit into screw holes so no screws required.I do not have a Dell, but a custom system with a discontinued Rosewill case. The drive bay is wide and nonstandard, and requires sliding drive brackets that I absolutely could not find anywhere on the internet.I have Prime and this item is Fulfilled by Amazon, so I tried this and got lucky. I shoved the caddy into the case, it fit really tight and stayed. Works for me!