Available on LP for the first time outside of Japan, experimental rock pioneers BORIS & noise mastermind MERZBOW present Klatter, the third collaboration between the two groups, and 04092001, a collaborative album featuring live renditions of the original Heavy Rocks LP!

04092001 was originally released only on vinyl in a limited edition of 500 copies, and immediately discontinued. The specially printed jacket is reproduced as faithfully as possible to this original release.