The new PEPETOOLS Jump Ring Maker is a great new tool which allows the user to make jump rings in twenty different sizes. Smallest inner core size is 2.5 MM and the largest is 12 MM. The inner core rods are held on the winder with a keyless chuck. Once the coil of wire is made, the coil is placed in the coil holding device and with the use of a number 30 hand piece. The coil is cut resulting in ready to use jump rings.