It is simply a demonstration ratchet that dealers used to show customers the internal mechanism of the new sealed head 800 series ratchets.
It is not meant to be used as it has a plastic cover plate.
If you wish to use it it would be a good idea to replace the cover plate with the regular metal one.
Replacement metal cover plates for it are not available from Snap On but a dealer may have one from a warranty, etc.
Probably your best bet would be to sell it to a collector and take the proceeds and buy a ratchet you could use like a Dual 80.
Snap On likes to use clear plastic on their demonstration tools.
Here is a clear plastic demonstration impact.
