Crash cymbals are a type of percussion instrument commonly used in drum kits. They are typically made of metal and produce a loud, sharp sound when struck. Musicians use crash cymbals to accentuate musical phrases or transitions, adding excitement and energy to a performance. These cymbals come in various sizes and thicknesses, affecting their sound and sustain. Crash cymbals are often played alongside other cymbals, such as hi-hat cymbals and ride cymbals, to create a fuller sound in genres like rock, jazz, and pop.