Features:_x000D_ 1. Made of premium material, these lock nuts are sturdy and durable._x000D_ 2. They can prevent vibration from loosening a bolted joint, resist loosening under vibrations to provide a locking action._x000D_ 3. These lock nuts are amazing replacement for normal nuts of hardware, vehicles, home or outside applications._x000D_ 4. Simple and fast to use, convenient to tighten or loosen._x000D_ 5. The size of the lock nut is M4, comes with 10pcs in total._x000D_ _x000D_ _x000D_ Description:_x000D_ Material: Aluminum/Nylon_x000D_ Type: Aluminum Alloy Hex Nuts_x000D_ Surface Treatment: Anodize_x000D_ Size: M4_x000D_ Color: Dark Red _x000D_ Quantity: 10pcs/Bag_x000D_ _x000D_ Note:_x000D_ Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!_x000D_ _x000D_ Package Includes:_x000D_ 1 x 10pcs Nylon Insert Self-Lock Nuts