Park Tool HCW-5 Double-Ended Bottom Bracket Lockring Spanner MFPN=GM4580-34 } Kool-Stop disc pads are

} Kool-Stop disc pads are made with organic materials that are blended and bound together using a resin

It works with all commercially available MTB and E-MTB drivetrains from Shimano to Box to Sunrace

Hardened tool steel machined X-Dome design for the cluster and stamped steel 38t and 44t cogs are pinned to the lighter weight aluminum 12th gear (Spider Cog)

and updated the core with a TrueBlend design that lets them tune the flex to perfection

Park Tool HCW-5 Double-Ended Bottom Bracket Lockring Spanner MFPN=GM4580-34 } Kool-Stop disc pads arePark Tool HCW 5 Double Ended Bottom Bracket Lockring Spanner. HCW Series Bottom Braket Tools