Hot Max 26009 Reducing Bushings for 3/4-Inch and 1-Inch Wide Wheels For use with 3/4-Inch and 1-Inch wide bench grinding wheels Can be used with 1/2-Inch, 5/8-Inch, and 3/4-Inch arbors Four different sleeves allows you to adjust the wheel arbor whole to the correct size arbor you need