I was just not quite clear what these rubber parts. I ordered out of curiosity. They make the flexi Eblen Button grip. They look quite funny and fulfill their purpose. Since they are not very expensive are a beautiful accessory and the kiddies have been pleased. Now, the controller will also no longer swapped. (We have a neighbor boy who likes to secretly times substitutes for the controller. The Broken is of course never his. The no. He can now bend.)