Engineering Formula Card
Over 140 engineer related formulas etched on a stainless steel card
kickstarter
by NobbyLabs
$2,745
of $750 goal
75
backers
The Calculus Card - Formula Heavy, Light in Your Pocket
An intricate collection of Calculus formulas/ equations, all on a piece of metal.
kickstarter
by NobbyLabs
$961
of $300 goal
34
backers