basically want to make a box with a locked compartment. Using capacitive touch sensors I created a touchpad. With the right combination, arduino moves some servos and opens the doors of the box. I need some kind of rail system to make the doors move smoothly.I need a piece of component which wraps around a metal rod and moves on it. I need it to make a rail system. I cant seem to find anything related, any advices?
something like the black plastic part in the photos.