Product Info Catalog Abrasives Bonded Points/Stones 4.5-In. Grinder Backing Flange 4.5-In. Grinder Backing Flange Request a Quote UPC: 28874047068 SKU: 399204 Model Number: DW4706 4-1/2", Backing Flange, For DeWalt #DW402 Grinder, True Value #849935.