I have a 10.8v battery operated one. Mine is a few years old now. I have just treated it to a new box of 150 accessories for £28
These things are simply fantastic. I regularly use it when refurbish Pinball machines.
Examples of recent jobs done with mine .
Cutting a flat screw head into a Phillips one that was rounded off
Removing snapped screws using the same method
Enlarging a lock mechanism to take a slightly wider europrofile cylinder barrel
Slightly reducing the size of a locking bolt so it acted smoothly.

These things are simply fantastic. I regularly use it when refurbish Pinball machines.
Examples of recent jobs done with mine .
Cutting a flat screw head into a Phillips one that was rounded off
Removing snapped screws using the same method
Enlarging a lock mechanism to take a slightly wider europrofile cylinder barrel
Slightly reducing the size of a locking bolt so it acted smoothly.
