Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:

Create a detailed description for the following product: Onyx Black Collection, belonging to category: Swiss Army Knife

### Response:
The Onyx Black Collection pocket knives are completely black. Thanks to an electro-chemical colouring process known as Polispectral, not only the scales, but every single function inside the knives – small and large blade, corkscrew or bottle opener, depending on the model – are deep black. At the same time, that process makes the material durable, as the chrome oxide film that is added to protect the stainless steel also preserves the material characteristics.
### End