Sirui's unique locking mechanism for guaranteed precision and safety; Separate control knobs for panning and locking, for fast easy operation; Bubble level makes horizontal adjustments quick and easy; 2 bubble level; -90 deg. / +90 deg. tilt adjustment; Base can be used with Arca-compatible quick release plate or 3/8 screw onto the tripod or Monopod; Arca-compatible Sirui Quick Release plate TY-70-2(L-20S), anodized aluminum with rubber non-slip surface and 1/4 bolt with folding D Ring for easy attachment to your camera; L-20S inchuded locking 360 deg. rotating base; L-20S's quick release mount plate can rotate 90 deg. for right or left hand operation; Max load: 25kg / 55.1lb; Neoprene transport bag