Brake Loaded Chair Castors – Set of 5. Brake loaded castors compatible with all of our chairs. These castors offer added safety and convenience: Free movement when unseated: Chair can be moved like standard castors when no one is sitting on it. Auto brake when seated: When weight is applied, a brake engages to prevent the chair from moving—helping avoid unwanted sliding or tipping. Safety first: Ideal for users who lean forward or backward, adding extra stability. Easy installation: Simply push into the chair base and pull straight out to remove.