• Character: 18K / 20K / 21K
• Character height: 0.7mm
• Steel shank's dimension: 74 x 6.8mm
• Shape of shank: Curve
• Premium Quality
• Made of durable long-lasting material.
• Able to make punching mark at inner ring.
• Mark your jewelry with quality karat value easily.
• Stamp the character on jewellery with hammer.
• Use brass brush to remove residue around the characters after stamping.