Wolf Tooth Master Link Combo Pliers with Purple Bolt. The Masterlink Pliers is a multi-tool developed to provide functions that are not on a typical multi-tool. It is designed to be light and compact so you can carry it with you. This tool serves as a tire lever Presta valve core remover valve stem lock nut wrench and master link pliers. It also provides storage for two master links so you will always be prepared on the trail. Magnets hold the master links securely in place and self closes the tool.