Conversation so far:
What was the first album Tool released?
Tool released their first full-length album, Undertow, in April 1993
Were the singles from the Tool album Undertow hits?
The single Sober became a hit single by March 1994 and won the band Billboard's Best Video by a New Artist award for the accompanying stop motion music video.
What else did they achieve during these four years?
Did the band Tool have any other members?
Tool experienced its only lineup change to date, with bassist D'Amour leaving the band amicably to pursue other projects.

Question: Who else was in the band?
Self-contained rewrite: Who else was in the band Tool besides Paul D'Amour?