100% quality control from production through to factory, ensuring reliable quality in use and eliminating concerns about secondhand or defective products. Main body constructed from quality aluminum alloy for strength, durability, and wear resistance; resistant to deformation and wear over longterm use. Open design enables installation and disassembly without removing the handle or derailleur, simplifying steps and saving time. Size specifications: pipe length 450 mm (17.7 inches); wire core length 650 mm (25.6 inches); clear dimensions to easily match corresponding requirements. Use scenarios: Bicycle maintenance and assembly: quick, straightforward installation and reliable performance with compatible components. Field repairs and workshops: open design speeds up disassembly and reassembly, reducing downtime. OEM or replacement projects: precise lengths ensure compatibility with existing setups and models.