Product review (5 stars): Must have!
If you're replacing your handle be sure to buy this extra spring.  Our handle only had a spring on one side but we ordered this one extra when we replaced the handle in case the spring was broken, too. Our old spring was fine but we decided to add this as a second one since it's made for it.  It works SO much better now than it did when it was new.  I feel like our old handle might not have broken if this other spring had been installed from the beginning.