Standard Pack = 1 piece(s). Type = Portable Hardness Tester ; Overall Dimensions = 3 X 6 Inch ; Includes = Hardness Tester, Operating Instructions, Test Block, Adjusting Wrenches, Hardwood Case ; Features = Suitable For Use On Ferrous And Nonferrous Metals From Small Diameter Rods To Large Surfaces, Special Bases Available For Use On Small Diameters Or Large Radii, Mechanical Tester Uses Special Preloaded Springs, Providing A Load Of About 8.8 Lbs ;