Cutouts intensify the cymbal's "trashy" character and shorten sustain, creating a drier, quicker, more explosive accent with less ring.
Trash cymbals typically have gritty, "trashy" or white-noise-like textures, an explosive, cutting attack, a darker or lower pitch, and generally short sustain/quick decay. Random hammering or thinner profiles add unpredictable, trashy overtones that help them cut through a mix.
The listings mention B20 bronze, machine-hammered sheet bronze, and MS63 brass alloy.
