• [Durable Metal] Crafted from sturdy metal for long-lasting use.
• [Size] Front axle nut: 8x12.5x21mm, Rear axle nut: 9.5x21.1x11.9mm.
• [Easy Installation] Conveniently install these bike axle nuts for quick bike assembly and hub tightening.
• [Wide Application] Ideal for mountain bike quick repairs, rear wheel hub quick release, mountain bikes, and training bikes.
• [Complete Set] Includes 2 front axle nuts and 2 rear axle nuts for bike maintenance.