Powerbuilt 648401 Brake Cylinder Hone 3 Arm 3/4-to-2.25-Inch Made to be the most reliable tools in the market today Tool solutions for most all situations Built to exceed tool standards 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 Made in USA; Lifetime Warranty