Need some help. What brand do these belong to? Yes they are ice auger bits. I know that
I would say the one on the right is Stikemaster and the one on the left is Jiffy brand. I agree with Randy on vintage, may be from late 70’s era.
The one on the left rotates counterclockwise thus my vote for it being a Jiffy product. The one on the right rotates clockwise, so they cannot be for the same powerhead.