This little brute was designed to impart the warm, smooth tone of an old Patent Applied For humbucker in a direct replacement, single-coil size. It possesses an even, dynamic response, and its adjustable pole pieces allow the guitarist to fine tune the string balance and dial in just the right amount of punch. Compared to the JB Jr., it has less output and more upper-mids. Comes with four-conductor hookup cable. USA Patent No. Des. 355,207.(SSL-1) Hot Stackå¨ (STK-S2) pickups, Cool Rails are for players who need a louder, punchier, and fatter single-coil sound. Comes with four-conductor hookup cable.