5/8" Electric Motor Arbor Adaptor This is a new 5/8" right hand thread electric motor arbor adaptor This is used to convert 5/8" motor shafts to 1/2" threaded shafts for mounting polishing, buffing and grinding wheels Measures approximately 3 9/16" (90 mm) long Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.