There are four bands with this name:
These are photos from concerts where Wool played, so they may be of other bands that played the concert as well.
Foo Fighters / Shudder To Think / Wool Jul 28, 1995 Los Angeles, California, United States Uploaded by Derghk
L7 / Wool / Rosa Mota Feb 9, 1995 London, England, United Kingdom Uploaded by R.B.
L7 / Melvins / Wool Sep 29, 1994 Kalamazoo, Michigan, United States Uploaded by Pathological Mastermind
L7 / The Melvins / Wool Sep 26, 1994 Toronto, Ontario, Canada Uploaded by Tmptmp
Dynamo Open Air 1993 May 29 - 30, 1993 Eindhoven, The Netherlands Uploaded by Please No Garbage
Dynamo Open Air 1993 May 29 - 30, 1993 Eindhoven, North Brabant, Netherlands Uploaded by Marcel Burgstad
Rage Against The Machine / Tool / Wool May 24, 1993 Glasgow, Scotland, United Kingdom Uploaded by Neil Lumsden
Nirvana / Wool Aug 15, 1991 West Hollywood, California, United States Uploaded by Zimtrim