12.7mm 2nd SATA HDD Hard Drive Optibay Caddy for Lenovo ThinkPad T420 T420i
T420 T420i R400 R500. Applicable model: FOR T420 T430 W series T420 T430 (optical drive thickness is 12.7MM). The clip design refers to the T420S, which is fixed with two screws, which is more stable than the original T420 with one screw.