This item is DIY jewelry clasps. Made of for durable and practical use. Perfect jump rings for connecting parts of jewelry together. A great jewelry making accessory for DIY jewelry making lover. Features -Color:Golden -Material:Alloy - Size: 10.00X10.00X2.50cm/3.93X3.93X0.98in (Box) - Size: 1.20X0.70X0.40cm/0.47X0.28X0.16in (Lobster clasp) - Size: 4.50X0.30X0.10cm/1.77X0.12X0.04in (extension chain) - Size: 0.50X0.50X0.10cm/0.20X0.20X0.04in (Jump Ring) - Adoption of premium iron material, sturdy and durable for long-term use. Packed with box, easy to carry. - And the surface is electroplated, not easy to corrode, not easy to deform or break, more durable. Each clasp opens and closes smoothly. - Making delicate hand crafts, a great gift for someone who loves DIY, they'll love it. - It come with sufficient number can meet any of your craft projects needs. - They can help you create , items, which can increase your manual ability. Package list: 400 x jump rings 400 x crimp ends 200 x extension chains 200 x lobster clasps