?Easy to install? pick the right length of screw, put the stud through the hole, align the nut with the stud and tighten the screw. Note: When installing, the hole please do not exceed 4mm, if the hole is too large, it is easy to cause the screw to fall off. ?Widely used? These leathercraft rivets are especially suitable for DIY various leather crafts, as a fixed or decorative items used. For example: belt connection, bag decoration, clothing decoration, key bag nails, stationery ledger nails, photo album nails, calendar screws, etc. ?Excellent design? chamfered design is safer, deep thread, not easy to slip during rotation, even force and good tightening strength. ?High quality material? these Chicago screws are made of high quality carbon steel with nickel plated surface, clear grain, smooth and burr-free, waterproof and durable, no rusting. ?90 sets of 6 sizes?Chicago rivet stud set includes 6 sizes (M5*4mm, M5*5mm, M5*6mm, M5*8mm, M5*10mm, M5*12mm), 15 PCS of each size.Date First Available: December 21, 2021. Manufacturer: imsiboc. Item Weight: 7.9 ounces. Best Sellers Rank: #5,167 in Arts, Crafts & Sewing. Customer Reviews: 4.6 4.6 out of 5 stars 372 ratings 4.6 out of 5 stars. : B09NYP9ZJR. Item model number: 1. Package Dimensions: 5.12 x 2.68 x 0.55 inches. Fastener Size: M5. Fastener Type: Machine Screw. Thread Coverage: Fully Threaded. Head Type: Round. Color: Black. Brand: Imsiboc. Metal Type: Carbon Steel. Exterior Finish: Black. Head Style: Round, Flat. Material: Carbon Steel.