WTF Mini Titanium Keychain
How many tools can you fit on a teeny tiny keychain?
Standard: 1/4", 5/16", 3/8", 7/16", 1/2"
Metric: 6mm, 8mm, 10mm, 11mm, 13mm wrench sizes
a built in Pry-Bar/screwdriver (Emergency chisel/glass breaker, staple puller, bottle cap pryer opener)
on it's side is a ruler, one side is Standard 1/4" increments, and the other is a Metric 1cm increments, the dimples also act as grip.
Phew that's a lot of tools... hold on there's more... can you use it as a Gear Tie? Yes!
Aluminum 6061-T6 - Ultimate Bearing Strength is 88,000 psi and weighs ~4.4 grams
Titanium Ti-6Al-4V - Ultimate Bearing Strength is 270,000 psi and weighs ~7.8 grams
(The Titanium version is about 3x stronger, and will probably last forever, the aluminum version is probably more for "light duty" only)
Check out this guys other project, the Bottle Grenade!