Each keycap set is inspected following below steps:

  1. Place each bag of keycap set on weight scale to determine if any keys are missed.
  2. Take all keys out and inspect those keys with higher "bad" rate recorded in the past.
  3. Replace zip bag and repack keycaps.

A lot of labor work as I am trying my best to deliver best-in-quality keycaps to you.

But nothing is perfect. If you have any issue with your keycaps, please email me at support@21kb.com, I will take care of it in my top priority.