Flex rivets are used to attach the TPU gaiter to the boot at the back. Sometimes, if the horse overreaches and steps on the boot, these rivets may break or get damaged. It’s easy to remove and replace the rivets though. You can use a drill or nippers to remove a damaged rivet and then replace it with a hammer, below is a link to a video to show you how to do this. Flex rivets come as part of the standard Flex Boot set when you purchase a boot, or with a spare TPU gaiter if you purchase it separately as a replacement part.
Click for a video of how to replace the rivets
Flex TPU gaiter /Flex TPU takaosa - YouTube
TPU Gaiter Rivets
TPU Gaiter rivets are used to attach the TPU gaiter to the boot.