Based on the answers provided, the following corrections need to be made to the 3D object:

1. Modify the object to resemble a box end wrench. This means it should have a completely enclosed ring at one or both ends designed to fit over a nut or bolt head.
2. Change the main body of the object to be rectangular rather than curved or semi-circular.
3. Ensure that there are two circles at the ends of the rectangle, each with a larger diameter than the width of the rectangle.
4. Make one of the circles slightly larger than the other.
5. Include two circular holes within the two circular ends of the object.