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

https://en.wikipedia.org/wiki/Impact_driver?wprov=sfla1

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[–] 19 points 5 months ago* (1 child)

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.

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