General description 4-Piece Mountain Bike Repair Tool Kit designed for outdoor cycling maintenance. This comprehensive set includes essential tools for mountain bike repairs, ensuring you are well-equipped for any maintenance task. Technical specifications Material: Metal Tool No. 1: Bicycle Chain Remover, Size: 20.1 * 6.8 cm, 3-in-1 functionality (sprocket whip wrench, hook lock ring tool, bottom bracket assembly tool) Tool No. 2: Bicycle Freewheel Cassette Remover, Size: 2.7 * 2.6 cm Tool No. 3: Bicycle Bottom Bracket Remover, Size: 5 * 3.2 cm Tool No. 4: Bicycle Crank Remover, Size: 7.6 * 1.9 cm