Smartbolt has an indicator when it's tight enough
It so simple but yet so useful.....
This is a practical and innovative design idea. Checkout Smartbolt, a bolt with visual tension indicator that starts out red and turns darker when tightened.
No more hassle in figuring out if you have tighten your bolt firmly and sufficiently.
There's also another version that goes from yellow to green when 90% tight, turning black at 100%.
[smartbolt]
This is a practical and innovative design idea. Checkout Smartbolt, a bolt with visual tension indicator that starts out red and turns darker when tightened.
No more hassle in figuring out if you have tighten your bolt firmly and sufficiently.
There's also another version that goes from yellow to green when 90% tight, turning black at 100%.
[smartbolt]
