With the patented design of this crimp tool you will get smooth rounded crimps every time. The PVC handles are designed for maximum comfort and leverage. Made of high grade steel, with a non-glare black oxide finish, and the jaws are precision ground to assure perfect crimps for years. For best results use high quality 2mm x 2mm tube shaped crimp beads. Pliers come with complete instructions. Check out our video on how to use this tool to complete a necklace.