Northland Shooters Supply sells one, that they say is for their BAT action. It's unclear if it would be appropriate for stock Savage actions.
Bighorn sells one that they say will work on Remington or Savage actions. It's apparently sacrificial, if used ham handedly, so it won't bugger up the action.
I get it, that one probably wouldn't want to apply the torque necessary to remove a factory barrel with an internal wrench.
thoughts and/or experiences?