Suzu (鈴) are round, hollow Japanese Shinto bells that contains pellets that sound when agitated.
Suzu come in many sizes, ranging from tiny ones on good luck charms (called omamori (お守り)) to large ones at shrine entrances.
[1] At Shinto shrines, large suzu drape over entrances, as it is said that ringing them calls kami, allowing one to acquire positive power and authority, while repelling evil.
There are ceremonies, for instance, where female performers dance with suzu bells such as those with some sort of short blade at their center.
The ones produced by hand however are still considered of higher quality due to the richer and more melodious sound.