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 1Made of premium material, these lock nuts are sturdy and durable. 2They can prevent vibration from loosening a bolted joint, resist loosening under vibrations to provide a locking action. 3These lock nuts are amazing replacement for normal nuts of hardware, vehicles, home or outside applications. 4Simple and fast to use, convenient to tighten or loosen. 5The size of the lock nut is M4, comes with 10pcs in total.