UNIOR: Product featuresmaterial: premium flex plus carbon steelsurface finish: chrome plated to standard ISO 1456:2009Tool can be used by professional or amateur mechanicsMaster link pliers are for commonly used chains with master link, SRAM Powerlink or the KMC Missing Link. After chain use and due to mud and rust, it can be impossible to remove the master link with only your hands. With Unior 1720/2DP Master Link pliers, removal of the master link is easy.