All swivel casters in the 3 Series are available with brakes. Colson’s Tread Lock brake gives positive braking action on all types of wheels by engaging a rubber brake shoe directly against the tread surface of the wheel. A self-compensating spring maintains the effectiveness of the brake throughout the life of the wheel. Thread guards can also be used with this brake. Brake pedals are rugged .090 steel & zinc plated. To order on a caster specify "BRK1".