Steel Dapping Block Great For Metalsmiths, Metal Working & Shaping Soft Metals & Waxes Steel dapping block The depressions have a smooth finish that are great for shaping metal Made from high carbon tool steel that is ground, hardened and tempered and has a Rockwell hardness of 45 Hrc Has 18 half spheres that measure approximately 1.1, 3.2, 4.8, 6.4, 7.9, 9.5, 12.7, 14.3, 15.9, 17.5, 19.1, 20.6, 22.2, 25.4, 28.6, 31.8, 34.9 and 40 mm (0.04", 0.13", 0.19", 0.25", 0.31", 0.37", 0.5", 0.56", 0.63", 0.69", 0.75", 0.81", 0.87", 1", 1.13", 1.25", 1.37"and 1.57") The block measures approximately 2" x 2" x 2" (51 x 51 x 51 mm) Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.