Sandblaster, 4.5", Quick Change Hub Adapter For Right Angle Grinder, Fits 4.5" and 5" Right Angle Grinders With A 5/8"-11 Thread Per Inch External Shaft Size, Attaches Easily, Spin On/Off Sanding Discs In Seconds, Makes Changing Discs A Snap, Quickly Attach A Variety Of Versatile Grinding, Sanding, and Finishing Discs Without The Need For Wrenches, Provides Support While Also Allowing Some Flexibility To Finish Contoured Or Curved Surfaces, Use With Sandblaster Right Angle Grinder Discs, Model #9677, #9678, #9679, #9680, #9681 and #9682.