if you mean can you put the saw and file on the same handle, ie. moving one to where a 'blade' is/was. then I'd say "no" or at least the lock won't work.what else were you thinking of putting into the 'wave' to replace blade #2 (serrated or PE) ?
looking at my wave. there is also a bevel where the lock touches the blade(s) they would be the opposite on the file/saw (I maybe not explaining this well, but I understand it )hopefully someone will be along soon with some pics
I think not as there is a little detent on line lock to keep the tool shut in and there is a little dip on tool for that detent.
I'd like to add you really should just get a wave and look yourself