6 pcs Mountain Bike Variable Speed Screw Shift Derailleur Adjustment 4mm Fixed Brake Bolt Screws

Feature: 1. Adopting ultra light aluminum alloy, numerical control processing, the surface anodized midrange fine tuning screw, bright color. 2. Smooth adjustment of fine internal thread coated with grease. 3. Effectively adjust the front and rear gear, to solve the jump gear and shift the inflexible problem. 4. Easy to install and remove. 5. Great accessories for cycling lovers. Specification: Condition: 100percent Brand New Item Type: Bike Speed Screw Material: aluminium alloy Quantity: 6 pcs Screen size: 62x62mm Size: variable speed fine adjustment Specification: variable speed universal Applicable: mountain road BMX speed brake line Parts: bicycle transmission adjustment screw Purpose: fine adjustment screw in bicycle shift Components: fine adjustment bolt for chain extractor Type: front derailer Scope of application: 4 mm shift cable and 4.5 mm shift cable Package List: 6 x Bike Speed Screw