Key features

• •Black Chicago Screws: These 155 sets black chicago screws with 7 size :M5*4mm;M5*5mm;M5*6mm,M5*8mm; M5*10mm;M5*12mm;M5*15mm and 3 lengths of M4 screws (3mm, 4mm, 5mm),meet your needs in different use.
• •Durable & Corrosion-Resistant Finish: Chicago screws for leather are made from high-quality carbon steel with a smooth,nickel-plated surface,tough gunmetal black coating,these screws resist water,rust,and wear.Their burr-free design and high hardness ensure a professional look and long-lasting performance in all your leather projects.
• •Widely Use: Featuring both flat and Phillips drive slots,these binding screws work with most standard screwdrivers. Perfect for leathercraft,bookbinding,bags,belts,shoes,journals and countless DIY applications
• •Easy to Install: Simply punch a hole,insert the rivet,align the screws,and tighten with a screwdriver. The dual-slot design allows for quick, tool-flexible assembly, making these screws as practical for beginners as they are for experienced makers.
• •Convenient Storage Case: All leather screw rivets come neatly organized by size in a sturdy, transparent storage box,with punch and Screwdriver. The reinforced design keeps your fasteners protected, portable, and always within easy reach—ideal for crafting at home or on the go.