Improved. Index marks now match mounting holes. Super smooth. 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 (with equivalent number of stops around) include: 20 (18 stops), 30 (12 stops), 45 ( 8 stops), 90 ( 4 stops). Stops around = 72, 36, 24, 18, 12, 8, 4 Height: 26mm. Weight: 210g. Max Load: 10kg (22lb). All metal construction. Control lever is also metal with no plastic or rubber.