My car has disc brakes in the rear, and the calipers have a small lever, which is pulled by the parking brake cable. (The parking brake uses the discs, so there is no additional drum or similar.)
When resetting the pistons, they also have to be rotated (clockwise in my case).
This system is quite common for many car models, but I would like to know how this works internally, so can anyone describe it or has some good references?