Our highest performing disc for carbon steelHigh density ceramic grain for maximum performanceAvailable in Bulk or Sait-lok?âòÀÞ?â Packaging, Resin over resin construction for a strong bond that is resistant to heat and moistureVulcanized fiber backing for heavy duty sandingBulk Spindle Packaging: Assures that each disc remains perfectly flat. The unique design offers the convenience of easy access and can be retightened to ensure that your discs are flat when you need them.SAIT-LOK?âòÀÞ?â Quick Change 5/8-11" Hub: Extends disc life and requires fewer disc changes. Must be used with a treaded backing pad. Available in Blue Line?âòÀÞ?â Packaging only.Custom Discs: All custom fiber discs are non-cancellable and non-returnableBacking Pads for Fiber Discs?Â?àare available in Accessories