Tough genuine Shimano tools. USAGE For installation and removal of 20-tooth splined cartridge bottom bracket such as OCTALINK and square bottom bracket USP Economical and compact version of TL-UN66 Hardened steel for rigidity and durability COMPATIBILITY BB-UN/ES/6500/5500/7700/7703/7710/M952
Best Price: £11.39 from Cyclestore