Hook assembly

A hook assembly comprising:

• a base having a chamber, wherein the base includes an adhesion portion, an opening and a window portion, wherein the adhesion portion is configured to be adhered to a surface, wherein the adhesion portion and the opening are provided on a back plate of the base, wherein the opening extends through the back plate of the base and the adhesion portion, wherein the opening has a first width, wherein the window portion intercommunicates with the chamber of the base, wherein the base includes two first pivotal portions respectively provided on two opposite lateral plates of the base, and wherein a center of each of the two first pivotal portions is spaced from the surface at a spacing;
• a hook portion provided on a bottom of the base;
• and
• a lean indicator pivotally mounted in the chamber of the base via a second pivotal portion, wherein the lean indicator includes a first face and a second face, wherein the first face has a feature different from that of the second face, wherein the lean indicator has a second width smaller than the first width, wherein a central axis of the second pivotal portion does not pass through a center of gravity of the lean indicator, wherein the central axis of the second pivotal portion is spaced from each of two edges of the lean indicator at a distance, and wherein the distance is slightly larger than the spacing.