This binding screw is made of premium material, which can withstand long-lasting use. Features the stainless steelmaterial, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color:Black-Material:Stainless steel-Size:2.70X1.20X1.20cm/1.06X0.47X0.47in-Size:1.50X1.20X1.20cm/0.59X0.47X0.47in- Made of stainless steel material, powder coating, high hardness. Main functions: combination, connection, fixation, wear resistance.- Easy installation: make a hole 0.5-1mm larger than the diameter of the female rod, place the screws and nuts on both sides of the locked object, and choose the appropriate tool to lock.- Suitable for all kinds of DIY, leather crafts, clothing making, or as a fastener to connect two objects. Such as thin photo albums, leather bags, wooden board connectors, etc.- Leather fasteners are suitable for clamping files, books, scrapbooks, photo albums, etc.- Easy to install and simple to use, not easy to rust and deform, high strength, excellent and durable.Packing list: 5 x sets of binding screws