Samye Institute has a one-page article and video on the bell and dorje as ritual objects in Tibetan Buddhism.
There are different kinds of bells, different sizes and definitely different sounds. If you’re thinking of using a bell in practice, let’s check in. Remember that when you use a bell, you may be holding it for long periods of time, and you may well be in a room with 20 other people using a bell, so consider the weight, tone and volume.
Please treat all ritual objects—including those from non-Buddhist traditions—with respect and great care. Always ask before handling another person’s texts, ritual implements, instruments or rosary.