Smartbolt indicates when tightened

Take this for convenience; smartbolt lets you know how tight it is. Yes, through those colored indicators one comes to know when exactly to stop twisting. Nothing electronic, just the little dot on the head changes from red to black, red to start with and black when it’s completely tight. Well, we don’t desperately need one, but won’t mind if it’s easily available.

Via: RedFerret

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