Made from high strength aluminum alloy, this bike bottom bracket socket tool is light weight yet sturdy, capable of withstanding high speed rotation and frequent use for long lasting We two models to choose from: 40.5-16 And 44-16, which are suitable for 16 tooth slot axles with outer diameters of 40.5Mm and 44mm, respectively, to meet the needs of different riders Easy Installation & Removal: Specifically designed for hollow techs threaded, this tool enables quick and easily bottom bracket installation and removal, making bike maintenance effortless and efficient Expertly crafted with precisely machining, every detail is perfect The anodized finish enhances both appearance and resistance, ensuring excellent in various conditions Features a unique precisely tooth design that minimizes slippage, providing stability even under high load for smooth installation and removal of bottom brackets, Manufacturer: Laikoutd