Laptop Hard Drive Caddy for Lenovo ThinkPad T400 T500 R400 R500 - SATA 2nd HDD Caddy Adapter Plug & Play, Supports hot swapping. Fast & Reliable connection in ThinkPad, just as the primary HDD. Fully integrated into ThinkPad laptop, no cables, PSU, software driver needed . Compatible: Lenovo ThinkPad T400,T500, R400, R500, W500, W700 and ThinkPad X200 UltraBase. Package: 1 x Hard Disk Drive Caddy Adapter (note: hard drive not included). 4x hard drive screws