Feature:1. Steel Material: This dapping block is made of hardened, polished 45 steel that is resistant to deformation to ensure durability and long life.2. Professional: Steel dapping block features a highly polished depression for use with punches to form and reshape domes.3. Make Dome Shapes: Doming die block can be used to make a variety of dome shapes in jewelry pieces with standard moulds.4. Accuracy Tool: Doming block's depressions are ideal for forming metal, with accuracy machining of all semi circular spheres.5. Anvil Hole Diameter: Support 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 18mm, 19mm, 20mm anvil hole diameter.Specification:Item Type: Dapping BlockMaterial: 45# SteelAnvilable Hole Diameter: Approx. 4mm / 0.16in, Approx. 5mm / 0.20in, Approx. 6mm / 0.24in, Approx. 7mm / 0.28in, Approx. 8mm / 0.31in, Approx. 9mm / 0.35in, Approx. 10mm / 0.39in, Approx. 11mm / 0.43in, Approx. 12mm / 0.47in, Approx. 13mm / 0.51in, Approx. 14mm / 0.55in, Approx. 15mm / 0.59in, Approx. 16mm / 0.63in, Approx. 18mm / 0.71in, Approx. 19mm / 0.75in, Approx. 20mm / 0.79in.Package List:1 x Dapping Block