Keycap sets are collections of individual keycaps designed to replace the standard keycaps on a keyboard. They come in various shapes, sizes, colors, and materials, allowing users to customize the appearance and feel of their keyboards. Keycap sets are popular among mechanical keyboard enthusiasts who seek to enhance their typing experience and express their personal style. These sets typically include keycaps for all standard keys, including letters, numbers, and function keys. Some keycap sets are compatible with specific keyboard layouts, such as ANSI or ISO, while others may offer unique designs or themes. Users can mix and match keycap sets to create a personalized look for their keyboards.