Quick Change Flap Disc Mandrel Abrasive Mounting Connector Size 1/2 In.-8.5 Abrasive Mounting Connector Type Threaded Hole Tool Mounting Connector Size 1/4 in Tool Mounting Connector Type Straight Shank Overall Length 1 1/2 in Product Type TS Quick-Change Disc Mandrel Compatible Wheel Diameter (Maximum) 3 in Compatible Wheel Diameter (Minimum) 2 in Compatible Wheel Thickness (Maximum) Not Applicable Compatible Wheel Thickness (Minimum) Not Applicable