Keep an extra brake cartridge on-hand in case of a contact event. Simply replace the blade and cartridge and you’re back to work. The Standard Brake Cartridge stops the spinning blade on contact with skin reducing the chances of a catastrophic injury. Revolutionary Safety Protection: Microprocessor-The lightning fast microprocessor is always sensing for a drop in the voltage coming from the blade. It activates the safety system within 5 milliseconds once it detects contact with skin.