If you already have a Shimano external bottom bracket wrench such as this one, you might need an adaptor to suit some bottom brackets:

• BB9000 Adaptor:
  If you have a XTR BB93, Dura-Ace BB9000 or Dura-Ace BB9100 you will need the BB9000 adaptor. These bottom brackets have a major (outer) diameter of 39-40mm.
• BBR60 Adaptor:
  If you have an Ultegra BBR60 or Deore XT MT800 bottom bracket get the BB9R60 adaptor. These bottom brackets have a major (outer) diameter of 41-42mm.

With these Shimano bottom brackets you will find the part number written on the outer shell.