The current Zildjian Swish Knocker is a redesign of their original swish, with more rivets, deeper bow and shallower bell, based on a cymbal made famous by Mel Lewis,[1] who coined the name knocker.

Originally a Zildjian exclusive, both swish and pang cymbals disappeared from their catalog for a time but have reappeared.

Both swish and pang have the upturned and flanged edge of a china cymbal, with a very small bell, a thin profile overall with little taper, and a relatively thick rim for their size and weight.

The swish has a higher tone than the pang and is washier with a less pronounced ping, and this difference is accentuated as the swish is generally sold with rivets as a sizzle cymbal, while the pang is sold without rivets.

However some drummers remove the rivets from a swish, or add them to a pang, to create intermediate sounds.