【Chicago Screws Material】: Chicago screws are made of carbon steel, are wear-resistant, reusable, robust and durable. Easy to group, install and disassemble. The leather rivets includes 5 sizes, the lengths are 20pcs 4mm, 20pcs 6mm, 20pcs 8mm, 20pcs 10mm, 20pcs 12 mm, enough to cover your daily needs.
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