This is more your industrial file cabinet but it means it is heavy duty enough to stand up to the often less than ideal stress I put mine under. Things stacked on top until I can sort through it, all sorts of machines from pc's to office printers, what ever has found a temporary home and these have never flinched. They lock fine, there are wires inside to keep files towards the front if you need them. My standard letter files and holders work fine without adapters so I'm plenty happy. They are made well enough that I can count on them being here for awhile without any special babying I've had to do with some of the nicer looking ones. Good stuff.