As a general rule, the strength of an anchor depends on three factors. Consider the object being hung, the type of surface it’s installed in, and the type of anchor being used. Plastic anchors can handle light loads of around 13 kg - suitable for towel bars, toilet paper holders, massive mirrors, or pictures. Threaded drywall toggles can handle heavier items (approx. 18 kg). Lastly, hollow wall anchors and toggles can take on loads of up to 22 kg.