Can AERO PLUG damage my handlebar?

No.

AERO PLUG adapters are designed to securely clamp the handlebar without damaging it.

The plastic inserts are custom-made to perfectly match the shape of the handlebar and distribute the clamping forces properly.

Additionally, two protective fabric tape strips are included to protect the handlebar during installation.

As with any bike component, it is important to respect the torque specifications indicated in the installation manual.