3M SandBlaster 9675 4.5-Inch Angle Grinder Quick Loading Adapter The product is 4.5" Hub Change Adapter Easy and simple use kit The product is manufactured in China Allows fast and easy attachment of abrasive discs for angle grinders No wrench needed for changing abrasive discs Supports disc yet remains flexible for finishing contoured surfaces 4-Inch fits 4-Inch M10 1.25 angle grinder; 4-1/2-Inch fits either 4-1/2-Inch or 5-Inch angle grinder with 5/8-Inch 11 shaft Will fit 4-1/2" and 5" angle grinders with a 5/8", 11 thread per inch external shaft size