Building key carrier with

tactile and visual differentiation.

I created an elegantly simple device for holding keys that featured visual and tactile feedback




I worked on:



Human-Centered Product Design

3 students

market research, user interviews, concept generation

passed portability, removability, and ease of use test

People Carry Multiple Keys

Interviews revealed that adults generally carry 4-8 keys of all sizes and shapes and develop strategies to identify them, such as memorizing key placements, mnemonic devices, physical alterations, and using flashlights in the dark.

Existing key products did not allow for differentiation of many (4+) keys and were often bulky, unaccommodating to car or mail keys, and lacking aesthetically.

Concept Generation

Our goal was to create a solution that could adapt to accommodate all types of keys. After a brainstorming session, we prototyped our three most promising ideas. 


  1. Hexagonal Key

  2. Key Pocket Knife

  3. Key Box

  4. Lights

Target User

To narrow down our solutions, we created a persona and a set of design requirements, primarily focused on removability and tactile differentiation, that we could later use as a way of calculating our defined "success" of the final product. 

Concept Generation - Round 2

With these new parameters, we improved upon our brainstormed ideas from the first concept generation and ended up with two final ideas:


  1. the key house

  2. the acrylic swivel

The Key to Happiness

Our final product was an elegantly simple device for holding keys that featured visual and tactile feedback and could hold 6-9 keys of different shapes and sizes. It took the form of an isosceles triangle with a swivel mechanism. Interviews with 50 people confirmed that our key carrier had adequate visual and tactile differentiation.

© 2018 by Nadia Jamrozik.