[M16]
1. Type: Backing Pad/Polishing Pad/Sandpaper Suction Pad/Backer Plate/Sanding Pad
2. Shank Material: Stainless Steel
3. Diameter: about 150mm/6"
4. Thread: M14 / M16
5. Drill adapter (shank): 0.3 inches (8 mm).
6. Max speed: 8500 RPM
7. Quantity:1PC
Package included:1 x Backup Pad+1 x Shank