Jewelry Tool Steel Dapping Block Each face with different size of the hemispheres. Jewelry Tool ... .2, 4.8, 6.4, 7.9, 11.1, 12.7, 14.3, 15.9, 17.5, 19.1, 20.6, 22.2, 25 ... .4, 28.6, 31.8, and 34.9mm(1 ... /8” to 1-1/3”). Jewelry Tool Steel Dapping Block ...