Before the introduction of the euro, francs were also used in France, Belgium and Luxembourg, while Andorra and Monaco accepted the French franc as legal tender (Monegasque franc).
Inside the caliper is a brake pad, a small block of friction material backed with a metal plate. When you step on your brake pedal, pistons inside the caliper cause it to apply pressure to the brake pad which squeezes the rotor, causing the car to slow or stop.
Brake rotors are metal discs that are attached to the wheels of a vehicle. When the driver pushes the brake pedal, the brake pads press on the rotor, creating friction, which forces the wheels to turn slower.ou may need a screwdriver or hammer to loosen the caliper. 1  Don't simply allow the caliper to dangle freely after removing it from the rotor, as this can cause damage to the brake hose. 2  Some mechanics hook the caliper out of the way on a secure part of the undercarriage or use a rope to tie it in place.