`- Self-extracting bolts with caps for carbon MegaExo cranks include a puller cap that threads into MegaExo crank arms. Road or Mountain crank specific\n- Preload bolts for left arm on non-carbon Mega Exo cranks include a small hex wrench fitting\n- FS-0020 and 0021 fit the No Pitch Bolt Design cranks (NBD)\n- Sold each