Sherman! tht was rather Nawtee!
Is he a very destructive chewer? as in would he have chewed it up tiny? or is he more of a few chews and gulp kinda guy?
It makes a difference only in that if he chews like Rusty its likely to be tiny and will pass soon on its own, if he isn't then you may have more to worry about.

Also I am sure you have already done this but have you looked for the remains of the handle EVERYWHERE?? (hoping that maybe he has it hid for later chewing pleasure kinda like bubble gum )

I really hope all is well please let us know how he and you are doing, and what the vet reccomends!

Hugs