Econo Twist 'n' Curl is used to create an endless variety of wire beads, coils, and jump rings. The tool includes 6 different mandrels - 3 round, 1 rectangle, 1 square, and 1 triangle. Round mandrels measure 2.5, 5, and 6.5mm, rectangle mandrel measures 2.5x10mm, square mandrel measures 6.5mm, and triangle mandrel measures 6.5mm. Can be used with 22-30 gauge wire. Measures 8 high and 4.5 wide when fully assembled. Includes instructions, tips, and ideas. Sold individually.