Feature: 1. The bottom is flat to prevent punching to deflect the object, punching accurately, and there are five different holes to meet your different needs. 2. Widely used for punching metal gasket, brass gasket, styrene sheet, leather punch, coin rings making and shipbuilding model etc. 3. Practical and wonderful jewelry making and processing tools, suitable for professional jewelers to use. 4. About 72 x 72 x 40mm / 2.8 x 2.8 x 1.6in of the overall size, strong toughness to ensure maximum durability. 5. Made of high quality excellent iron material, strong and durable, high hardness, good wear resistance. Specification: Item Type: Punch Die Disc Material: Iron Application: Punching machine, suitable for punching metal gasket, brass gasket, styrene sheet, leather punch, paper, decal paper, coin rings and so on Overall Size: Approx. 72 x 72 x 40mm / 2.8 x 2.8 x 1.6in Model Type: 1/2-12mm, 5/8-16mm, 3/4-19mm, 7/8-22mm, 1-25mm Usage: When using, please put the punch die disc flat. The metal sheet to be punched is quenched and annealed first, and then put into water for sudden cooling. Then take out the punching column of the punch die disc, put the metal sheet into the middle gaps, drop two drops of glue if necessary to fix the metal sheet, and scrape it after finishing.Then aim at the desired aperture, the plane of the punch column downward, chamfering upward, the metal sheet with a sledgehammer can be vigorously knocked into pieces. Note: if you use a manual hammer, the hammer head should be large and the strength should be large. Try to hammer it out with one hammer, otherwise it is easy to cause the agent or the edge is uneven. You can also use a hydraulic press to save effort. Manual punching cross section will have traces, can be polished on it. Tip: This product belongs to heavy industry, so it is not delicate, the surface will have scratches, rust, oil stains and so on, the material is cast iron, apply oil frequently to prevent rust for ordinary use.. Package List: 1 x Punch Die Disc