Perforated with 2" holes, this innovative Crash cymbal delivers raw, dark and dirty bite. The Sabian 18" HHX Evolution O-Zone Crash in a Killer O-Zone! Until HHX, it was impossible to project darkness. But the dark, simmering sound, agitated bite and "Tone Projection" design of HHX makes this series more effective than others. Other cymbals may generate darkness, but HHX stirs up more simmering heat, more musical dirt, more of what drummers want to hear