The product is a 9.5mm universal hard drive caddy designed for SATA 2nd HDD or SSD hard drives. It is made of aluminum and features a direct replacement fitment type for 2.5-inch drives. The caddy is compatible with SATA I, II, and III interfaces and includes a free screwdriver. It does not come with a hard drive included, but it offers a universal solution for adding a second hard drive to your system.