Bras magique articulé à friction réglable YELANGU de 7 pouces (noir)

1. A single locking knob can be quickly locked and loosened.
2. Independent joints, faster turning direction.
3. Fit the upper and lower tooth surfaces to prevent slippage and increase the locking force.
4. The ball head and thread are made of stainless steel, which is firmer and more reliable.