Left. Right. Spindle lock washer. A flat disc with a hole in the center that is placed under or between the Wheel Spindle or related components to even out pressure as they are tightened. A ring with teeth used with a ABS Wheel speed sensor on a vehicle, typically located on a CV axle, rear differential or axle hub. Exciter Ring. Reluctor Ring. rotor. Wheel Speed Sensor Tone Ring. Control. Indicator. Spindle lock washer. Stub Axle Washer.