8mm Bicycle Hydraulic Brakes Bolt Tool Cycling Wrench Bike Disc Brake Cable Tool for 1/4 Head Torque Wrench Cycling Repair Tools. Exceptional Durability: Made from high-quality high-carbon steel, this bike disc brake cable wrench boasts excellent strength and endurance, capable of withstanding heavy use and ensuring stable performance across various conditions, thus extending the tool's lifespan.