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Euler's Identity Math Formula Keychain

4.6 out of 5 stars rating
5388 Total Reviews |
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Aluminum Circle
+$1.85
+$1.85
+$19.40
+$19.40

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Style: Metal Circle Keychain

Keep your keys safe and spectacular with this sturdy aluminum keychain from Zazzle. Beautifully printed on both sides, you can choose from thousands of designs, or personalize it with your own photos, text or unique designs. Label your car keys or keep a family photo of loved ones close to you at all times, these personalized keychains are light and waterproof.

  • Dimensions:
    • Diameter: 2"
    • Depth: 0.045"
    • Weight: 0.05 oz.
  • Full-color, full-bleed printing
  • Silver colored metal key ring with plastic snap ring
  • Light and waterproof
Designer Tip: To ensure the highest quality print, please note that this product’s customizable design area measures 2” in diameter. For best results please add 1/16" bleed

About This Design

Euler's Identity Math Formula Keychain

Euler's Identity Math Formula Keychain

Euler's Identity is a mathematical formula which produces a simple relation between 4 of the most important mathematical constants: Euler's number e, pi, the imaginary unit i and 1. A real geek shirt.
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Customer Reviews

4.6 out of 5 stars rating5.4K Total Reviews
4186 total 5-star reviews779 total 4-star reviews212 total 3-star reviews115 total 2-star reviews96 total 1-star reviews
5,388 Reviews
Reviews for similar products
5 out of 5 stars rating
By Zali O.August 9, 2023 • Verified Purchase
Aluminum Circle, 2"
Zazzle Reviewer Program
These are so cute and beautiful made. Printing is good clear
5 out of 5 stars rating
By Jessica K.March 2, 2023 • Verified Purchase
Aluminum Circle, 2"
Zazzle Reviewer Program
These keychains were perfect for our 5th grade traveling volleyball team. I just added a tassle, and they were the perfect gift! .
5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!

Tags

Keychains
mathematicsmathnerdgeekformulaformulaseulergeometrynumberscalculate
All Products
mathematicsmathnerdgeekformulaformulaseulergeometrynumberscalculate

Other Info

Product ID: 146748082929993586
Created on: 6/5/2012, 11:52 AM
Rating: G 
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