Size: Style 1:13x5x4mm, hole: 1.4mm, inner wide: 4mm, 45pcs/color, 4 colors, 180pcs/box; Style 2: 9x4x3.5mm, hole: 1.8mm, inner wide: 3mm, 90pcs/color, 4 colors, 360pcs/box; Style 3: 6x3x2.5mm, inner wide: 2.5mm, hole: 1mm, 90pcs/color, 4 colors, 360pcs/box; Total is 900pcs in one plastic box, colors are antique bronze, golden, platinum, silver.Material: These folding crimp ends are made of metal iron, hard material, sturdy and durable, will not easy to break. Their beautiful designs help you make own unique jewelry making with your imagination.Easy to Use: Firstly insert the end of the cord onto the U-shaped tube and gently press down with jeweler's pliers. The loop at the top of the square makes it easy to add a clasp or other connector. You can attach your clasp or jump ring to the loop on the end.Wide Application: These cord end jewelry connectors are essential and versatile accessory for jewelry making. You can get started on making earrings, necklaces, bracelets, charms, anklets and more.Storge: These iron folding crimp ends are packed in a plastic box to avoid damage or bent in storage. Compartments of storage box separate open jump rings and allow you to find the right one easily. It is onvenient for you to carry and store.