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 to a performance. These cymbals come in various sizes and thicknesses, affecting their sound and sustain. A thicker cymbal generally produces a brighter, more cutting sound, while a thinner cymbal offers a warmer tone. Drummers often combine crash cymbals with other cymbals, like hi-hats and ride cymbals, to create a full and dynamic sound.