Featured product in Chapter 10 of the Lee Modern Manual. No more wasted components with too soft or too hard lead. Cast and load with confidence knowing your alloy is up to the job. Quickly and precisely check hardness of your lead alloy. Exclusive conversion chart tells the maximum operating pressure of any lead alloy. Kit includes calibrated hardened steel ball indenter. V block cradle snaps into standard ram. 20 power 4 lens optical measuring microscope.