For Lenovo ThinkPad T510 T420 R500 12.7mm 2nd SATA HDD SSD Hard Drive Caddy Tray
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.