The thickened spacer structure delivers strong during installation Help maintain a perfectly parallel pressing force, ensuring smooth and secure bushing insertion into the shock eyelet This shock bushing tool is suitable for road bikes and mountain bikes Two Size Adapter ( 12-14mm / 12.7-15mm), suitable for a widely ranges of rear shock bushings, problem caused by size mismatches such as looseness or excessive tightness Clear Installation Window Provide real time visible during both installation and removal, Ensures positioning Exclusive Guided Bushing Installation Adapter, ensures bushings is press in parallel, effectively misalignment and reducing the risk of damage