It’s because that’s an impact rated bit.
They have a thinner section that flexes a little bit to prevent the bits from shattering when used in an impact driver.
All the different brands like to put a little ring with their colors on the torsion zone.
That yellow band means it’s either a DeWalt locking bit, or a cheap knockoff of the DeWalt bits
Oh cool, none of mine have that. Wonder when they started doing that
It’s because that’s an impact rated bit. They have a thinner section that flexes a little bit to prevent the bits from shattering when used in an impact driver. All the different brands like to put a little ring with their colors on the torsion zone.