Question

a bolt head is rusted and partially rounded off. which wrench would work best for removing the bolt? open - end wrench. 6 - point box - end wrench. 12 - point box - end wrench. none of the above.

Explanation:

A 6 - point box - end wrench has a better grip on the bolt head compared to a 12 - point box - end wrench. An open - end wrench has less contact area and is not ideal for a rusted and rounded - off bolt. So, a 6 - point box - end wrench is the best choice for removing a rusted and partially rounded - off bolt.

Answer:

6 - point box - end wrench.