2" and 3" random orbital air sander specifications: Pad Size: 1â and 2" and 3" Velcro Backing pad. Free Speed: 15,000RPM. exhaust: Rear End. 1 pcs screwdriver for replacing hook and loop pad. High-quality professional mini air random orbital sander with 27 pcs different materials and sizes buffing pads, 15 pcs sandpapers, 3 pcs backing plates, 1 pcs screw, and 1 pc screwdriver.