Torque You Can See with a Tension Indicating Bolt ?

[F Body]

This is a clever idea



The idea behind these bolts is a dot in the center of the head that turns dark when properly torqued or red when it gets loose. There's a clear window in the center of the head covering a pouch with a dark blue liquid. At the proper torque that's all you see. If loose, a red tipped plunger in the center turns the window red.

There are a lot of other very unusual items if you follow the link below :

http://www.inventables.com/technologies/tension-indicating-bolt\" target=\"_blank\" rel=\"nofollow\">http://www.inventables.com/technologies/tension-indicating-bolt

[F Body]

It might also finally stop me over tightening bolts