Knives are an essential part of the inventory for both professionals and individuals performing small repair or hobby work. Here are the key features and types of knives:

1. Purpose: Knives can serve various purposes, such as cutting food, processing wood, metal carving, stripping wires and cables, and even performing precise surgical procedures.

2. Blade Types: Knives have different types of blades depending on their intended use. For example, kitchen knives have sharp edges for cutting food, while chisels have wide blades for working with wood.

3. Blade Material: Blades can be made from different materials, such as stainless steel, carbon steel, ceramic materials, and others, depending on requirements for durability and corrosion resistance.

4. Handle: The handle of a knife can be made of wood, plastic, metal, or other materials. It is designed for comfortable grip and safety during use.

5. Opening Mechanisms: Some knives are equipped with opening mechanisms, such as buttons or levers, making them foldable and compact for carrying.

6. Safety: Using knives requires caution and adherence to safety measures to prevent accidents and injuries.

There are numerous types of knives, including kitchen knives, scalpels, hunting knives, utility knives, folding knives, utility knives, and more, each designed for specific tasks. The choice of the appropriate knife depends on the specific needs and tasks at hand.