Crafted from aluminum alloy, this mountain bike bottom bracket tool delivers wear resistance and protections, ensuring long durability. Its fits multiple bottom bracket standards without adapters, eliminating installation hassles across mountain bikes and city bikes models. Ideal for bike owners and maintenance riders, it empowers cyclists to upgrade drivetrain components while maintaining great across their bikes. Whether tackling mountain trail or navigating city commutes, the light weight construction reduces bike weight while sustaining precisions power transfer. Package includes: 1Pc Bike Bottom Bracket Sleeve