Usually the boxes of screws come with the bottom, more silver bit. But today's box had the duller grey, bit with a green lap band. No idea if one is better than the other or not.
Edit: Thanks to @0x0@infosec.pub for the wiki article!
Bits like that are used for impact drivers
That reduced diameter acts as a spring to absorb some of the torque being transmitted from the impact driver to the fastener.
The straight bit will not flex or elastically deform, but will fail in torsion without warning. These bits are not "impact rated", but are meant to be used with hand tools.
It's green because it's not quite ripe yet. Leave it in the sun for a few days, and it'll be good to go.
that green band is a torsion zone. that bit is made to work with an impact driver. the shape spreads the increased torque over a larger area, making the bit last longer.
the plain bit is made for a regular drill, you can not use it in an impact driver unless you want to risk breaking it.
Bits like that are used for impact drivers
Ooh, an upgrade! Yes, an impact-rated bit is better.
Oh, I thought it was a spirit level mid bit. I was trying to figure out how the structural integrity would work.
It’s got that glow in the dark upgrade, for when you need to fasten screws in stealth. Handy!
are they color coding torx bit sizes now?
If its been built recently, probably not better.
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