Used for office stationery, leather goods, apparel, arm belts, and similar applications. Provides combination, connection, fixing, and wear-resistant functions. When using screw posts for binding booklets, photo albums, or similar items, drill a hole at the desired position, with the hole size 0.5mm larger than the diameter of the nut rod of the binding bolts. Based on the thickness of the booklet, select a screw with a corresponding nut rod length, and insert both ends into the holes to connect and lock securely. APPLICATION: Suitable for thin albums, decorative bags, leather belts, sandals, boots, leather bags, helmets, and other leather or craft projects. Ideal for various art and leather crafts, as well as DIY clothing production. INSTRUCTIONS: Drill a hole 0.5mm larger than the nut rod diameter. Place screws and nuts on both sides of the material to be secured. Use an appropriate tool to tighten and lock. ADVANTAGE: Features precision mechanical threading and is made from high-quality stainless steel for rust resistance. These screws are a reliable choice for leather garments and accessories. Color: Silver Material: Stainless Steel Package Contents: 10 x Single Screw (M6 x 20mm) 10 x Pair Lock Nuts (M6 x 18mm) NOTICE: When using post screws for locking, the total thickness of the material must be less than the combined length of the screw rod and nut rod; otherwise, proper locking cannot be achieved. The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.