The drag brakes offer continuous resistance to allow the user to control the speed of the rollator walker. These drag brakes are mounted above the wheels on both sides of the frame. The desired resistance can be adjusted by tightening the adjustment screw and can be set to zero when used in wheelchair mode. The drag brakes are compatible with any Rollz Motion rollator walker but it is not reccommended to be used with air tires. The drag brakes come in a set of two.