Super smooth. Includes AM-01 (removable) Arca Mount. 1. Anodized to a scratch-resistant, black finish. 2. Lubricated bearings for smooth rotation. 3. Laser engraved index marks. 4. Two Knobs for locking top platform and panning base rotation. 5. Detent interval can be changed easily. 6. Ideal for making HDR (High-Dynamic Range) panorama. 7. Can be used as a normal panning base 8. 4 detent interval options: 4 different degree stop increments. 4 different degree stop increments (with equivalent number of stops around) include: 8 deg,12 deg, 15 deg and 18 deg Stops around = 45, 30, 24, 20. Height: 26mm. Weight: 210g. Max Load: 10kg (22lb). All metal construction. Control lever is also metal with no plastic or rubber.