A latch, a clip for attaching the panel to the seatpost made using 3D printing technology. To attach the panel, gently press the red button and slide the panel into place (a gentle "click" will be heard when it snaps into place). The panel will not release itself until the button is pressed. All metal elements are made of stainless steel. In the event of dirt, rinse thoroughly with cold or lukewarm water. The set includes screws for mounting on the seatpost. Fits Deus l, Deus ll and ORX.