Feature:1. Steel material: This bicia block is made of hardened, polished 45 steel, which is resistant to odkeducation to ensure durability and long service life. 2. Professional: The steel tapping block has a highly polished withagdeep to use with stamps to form and transform kopuł. 3. Create kopuły shapes: Doming die block can be used to make various kopuł shapes in jewelry with standard forms. 4. Accuracy tool: Withag, Doming block depths are ideal for metal forming, with precision machining of all semicircular balls. 5. Anvil hole diameter: support 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 18mm, 19mm, 20mm anvil hole diameter. . Steel Block Dapping Semi-Round Tool for Specification:Article type: Dapping block Material: 45# Steel Anvil hole diameter: approx. 4 mm / 0,16 inch, approx. 5 mm / 0,20 inch, approx. 6 mm / 0,24 inch, approx. 7 mm / 0,28 inch, approx. 8 mm / 0,31 inch, approx. 9 mm / 0,35 inch, approx. 10 mm / 0,39 inch, approx. 11 mm / 0,43 inch, approx. 12 mm / 0,47 inch, approx. 13 mm / 0,51 inch, approx. 14 mm / 0,55 inch, approx. 15 mm / 0,59 inch, approx. 16 mm / 0,63 inch, approx. 18 mm / 0,71 inch, approx. 19 mm / 0,75 inch, approx. 20mm / 0.79 inch . Steel Block Dapping Semi-Round Tool for Package List:1 x Dapping Block . Steel Block Dapping Semi-Round Tool for