Steel Dapping Block Great For Metalsmiths, Metal Working & Shaping Soft Metals & Waxes. This is a new 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)We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.