SRAM S100 Mechanical Rear Derailleur Bolt Kit Description: This SRAM S100 Mechanical Rear Derailleur Bolt Kit includes vital small parts utilized when installing or servicing mechanical versions of SRAM S100 rear derailleurs. Features: Replacement bolts, limit screws, and parts for SRAM S100 mechanical derailleurs Includes aluminum Half-Mount B-bolt/axle, dust shield, and ring clip Specifications: Material: Alloy