http://tinyurl.com/n3sy8of
Powerbuilt 648403 1-1/8-Inch Length Brake Cylinder Hone 2 Arm 3/4-Inch to 2-1/2-Inch Diameter
Fits 3/8-Inch drive power drills
Self-aligning and self-centering
Flexible shaft with adjustable tension for use on or off the car
Includes #220 medium grit stones, 1-1/8-Inch length
The right tool makes the job easier