About Jump Ring Maker 2 (JRM2) The World's Best Selling Jump Ring Maker! Newly Redesigned & Better Than Ever Features: HDPE machined organising base. Precision machined cutting box, hand-piece holder, mandrels, mandrel base, and more! 20 Mandrels (2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12)mm Stainless steel blade arbor. Use only with Foredom H.30 (with a Foredom SR Motor) Beautiful design! Includes PepeLube Pepetools 1 1/4” Blade Finally a way to make thousands of jump rings quickly and easily. With the included .008" HSS blade, there is minimal required cleanup. The thin, ultra strong blade slices non ferrous material right down the middle for a clean cut without burrs, scratches, or waster material. *Warning* Not to be used with stainless steel or nickel steel MADE IN U.S.A CLICK HERE FOR INSTRUCTION MANUAL Check out this graph provided byNancy Hamilton that shows the corresponding jump ring diameters with which blade should be used. If you are having trouble cutting through thicker gauges at various diameters this chart will clear up any questions. Chart Here