Make your designs positively unique with the Wubbers medium square mandrel pliers. These unique pliers can be used for shaping, coiling, wrapping wire and sheet metal. These pliers will create square shapes. You can use them to create unique jump rings or fun wire-wrapped shapes. The medium square mandrel pliers are for use with up to 14-gauge wire or finer, as well as 22-gauge sheet or lighter. These pliers are handcrafted for superb quality and engineered for comfort and control. These pliers make square rings with inside diameters of 6mm and 8mm. The outside diameter will change depending on what gauge of wire you use.