A handheld tool includes a handle to be held by a human hand, a head, which is engagable with a fastener, a shaft extending from an end of the handle terminating at the head, and an indicating member arranged on the tool. The indicating member indicates tightening or loosening of the fastener when the tool is operated to rotate the fastener. The indicating member is helpful for a user to make sure a direction of rotation required for retightening and loosening the fastener.