: The top choice for durability; it is resistant to rust, corrosion, and tarnishing.
: Offers a classic, vintage look that develops a patina over time but may require occasional polishing.
: Provides a sophisticated, professional appearance; genuine leather ages well but requires maintenance.
: Best for vibrant, colorful designs or bulk promotional giveaways, though less durable than metal. 2. Determine the Correct Size
: Add approximately 10mm to this measurement to ensure keys move freely and allow for future additions.
: Lightweight yet strong; often anodized in various colors for customization.