Files for callus and Black's files for nail.

The head on the 9-60 is very narrow.  Narrower still is the 9-90 which has a curved head on one end (also available in diamond coated).

The 9-91R has a Black's file on one end and a 2mm curette on the other end.  Look for it under Curettes.

The 9-68 is offset forward and is difficult to use.  The 9-62 is offset down and is very stable and easy to use.

The surgical bone file 8-55 is very rough on one side and less so on the other side.

The Diamond Deb file 8-80 has diamond grit on both sides for 80% of its length and is great for callus and nail.

The plastic 8-60 is often sold to patients because they can use them wet and dry.  Front and back have different coarseness.

All stainless steel files can be sterilized.