Why are vehicles fitted with directional pads? The reason for certain vehicles being fitted with directional pads is that the asymmetrical pads create a perfect angle for the friction material to make contact with the disc. This prevents unwanted vibration in the braking system. This type can be easily identified by the arrows on the rear of the brake pads. When fitting these pads please take note of the following: - Always pay attention to arrow directions and other markings - The rear of 2 pad