The White Pad Driver provides a buffer between the scrubber machine and floor pad and acts as a holding pad for floor pads without a center hole. It is compatible with both circular and rectangular machines, with maximum speeds of 320 RPM. Size: 14" x 28"; For Use With: Oscillating Machines; Rotating Machines; Material(s): Latex; Polyester Fiber; Quantity: 10/Carton.