Package Includes There are a total of 10 sets of matching bolts and nuts in each card paper packet, plus a six-pin wrench to help you complete the installation without a hitch. It's very convenient and paired, not difficult to lose accessories. Rust-proof and durable The fixing screw post is made of high quality carbon steel, black powder coated, hard and durable. It is not easy to rust and can be used in damp places. Exquisite workmanship The bolt thread is clear and deep, without burrs, which can achieve a very strong fastening effect; In addition, the interior hexagonal groove design can be well matched with the six-pin wrench to prevent slippage during installation. Easy to use First,a hole 0-5mm larger than the diameter of the nut rod, put the screws and nuts on both sides of the object to lock, then use a hex key or tool suitable for locking and completing the fixing. wide application This binding screw position is suitable for thin photo albums, decorative bags, belts, sandals, boots, leather bags, etc. It is suitable for the production of various crafts and leather garments and DIY. Specifications Product Name: Assorted Black Screw Nut Material: Carbon Steel, Black Plated Color: Black Quantity: 10 sets weight: 136g Detail dimension Bolt tail: 6 x 35mm dim head diameter: 12mm Nut size: 7.5 x 14.5 mm nut head diameter: 13mm hole diameter hex: 4mm Package Contents 10 x Black Bolt Posts 10 x Black Socket Nuts Note: Manual measurement, please allow slight errors, please refer to the actual product