Shimano Hollowtech II Bottom Bracket Adapter TL-FC36 This is a dedicated wrench, perfect for installing and removing Hollowtech II bottom brackets. It features a design with attention to detail, including high-precision laser cutting and a length that makes it easy to apply force. Please note that to reduce shipping costs, the backing card will be folded once to fit within the Yu-Packet Post size before shipping. ◆Material: Steel shimano / Shimano / Hollowtech / Hollowtech / Wrench / Bicycle / Tool / Bottom Bracket