Size: Steel Perforating Needles: 4.2x0.25cm, Head: 0.6mm/0.8mm/1mm/1.2mm/1.5mm/2mm/2.5mm/3mm/4mm/5mm/6mm/8mm;Steel Engraving Pens: 4.2x0.25cm, Head: 0.5mm/0.8mm/1mm/1.5mm/1.8mm/2mm/2.5mm/3mm/4mm/5mm/6mm/8mm. High Quality Stainless Steel: This is a pendant are made of quality steel. not easy to break, deform or bendsmall earrings are decorated with smooth surface, showing metallic luster. Package Contents: Our includes 2 products, steel piercing needle and steel engraving pen, 12 styles, 1 piece/style, 12 pieces, a total of 24 pieces Wide application: Perforating Needles & Engraving Pens are ideal for grinding and carving field stones, ceramics, glass, tiles, marbles, jewelry, rocks, etc DIY crafts: Highly recommended for crafts, hobbies, home repairs, jewelry, gemstone use, modeling, and more, and is illegal for love-loving crafters