34.9 screw type seat post lock for 31.6 seat post

A bicycle saddle lock (also known as a saddle clamp) is a mechanical part used to fix the saddle (seat post) to the bicycle frame, preventing the saddle from sliding up and down when pedaling. This is an important part that helps keep the saddle in a stable position, ensuring safety and comfort when cycling.

Tightening screw: Used to adjust the clamping force of the seat post lock, keeping the seat post fixed at the desired position.