You can buy extra blades for both the Rapala’s and the Mr Twisters at most sporting shops and there does seem to be a good deal of difference amongst them. Some last a lot longer than others—some are junk right outta the plastic wrap.
They all burn out sooner or later with the 12V models overheating more quickly.
I have a Mr Twister with short blades for doing perch and removing Y bones and rib bones from pike and pickerel and i have a Rapala with 9-inch ladies for slaying the sides of big fish.
Speckled trout and Lakers have Y bones too