What are the definitions and classifications of luggage accessories

What are the definitions and classifications of luggage accessories
Simply put, luggage hardware refers to various small hardware components used in luggage, backpacks, handbags, etc. Most luggage hardware accessories are not final consumer goods, only a small portion of daily hardware accessories (luggage decorative chains, hanging chains, etc.) can be used as final decorative consumer goods. Luggage hardware accessories can be roughly classified according to the following: material, appearance, color, specifications, etc.

Luggage hardware can be classified into die-casting hardware such as iron, copper, aluminum, zinc alloy, etc. according to their materials.
Luggage hardware accessories can be classified according to specific product categories, including pull rods, small wheels, mushroom nails, collision nails, foot nails, hollow nails, pull heads, corns, D-buttons, dog buckles, needle holes, belt buckles, chains, coils, locks, hand cranks, corner protectors, magnetic buttons, various trademarks and decorative hardware, etc. Various types of hardware are classified differently based on their functions or shapes.
And there are also many specifications for various hardware accessories.