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Those lumps are the pivots
that make it spring.
When you put the extractor into the channel, it should bind slightly. That's the tention being loaded to keep the claw inboard, around the rim.
If you want to try removing them, go ahead. Buy a replacement first, it'll save you some time.
By the way, the Wilson extractor is a good reliable aftermarket extractor. Others may be good too, but I've used Wilsons.
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