Versatile design: Professionalgrade bike chain tool with ergonomic red and black grip handle for comfortable operation and precise control. Durable construction: Heavyduty steel construction ensures reliable performance for breaking and joining bike chains of various sizes. Easy operation: Features a springloaded chain pin guide and rotating handle that makes chain removal and installation quick and efficient. Compatibility: Works with most standard bicycle chains including singlespeed, multispeed, and derailleur systems. Use scenarios Roadside or field maintenance: Use this tool to break and join chains on standard bicycle chains for emergency repairs on singlespeed or derailleurequipped bikes. Home workshop maintenance: Ideal for routine chain removal and installation on multispeed bikes and derailleur systems, or when replacing a chain. Bike or professional use: Serves a range of bikes with singlespeed, multispeed, and derailleur chains, supporting servicing and chain size adjustments across models.