for beads from 2 to 3 mm which works with either tube crimps or round crimps. We recommend that you use round -spherical- crimps if the crimp is going to be hidden as they hold better than tube crimps. Tube crimps are more attractive when they are to be seen. With the patented design of Euro crimpers you will get smooth round crimps, rather than flattened crimps with sharp or pointed edges as you do using conventional pliers. The PVC handles are designed for maximum comfort and leverage. All four sizes are made of high grade steel, with non-glare black oxide finish, and the jaws are precision ground to assure perfect crimps for years. Complete with Instructions.