SWEBO LS001pro Micrometer-style Precision Macro Focusing Slide Rail has 3 major upgrades: 1,The built-in foldable rocker handle does not affect the integrity of the knurling of the knob and does not affect the feel. 2,The quick-release plate clamp features a 45-degree angled knob, which compared to traditional knobs, provides superior ergonomics and efficiency. Operation is not hindered by the camera body or lens. 3,The slide rail adopts copper self-lubricating components, free of lubricating oil and dirt Continuing the tradition of precision, the micrometer-style scale knob achieves a movement accuracy of 0.01 millimeters. The precision trapezoidal screw is made of copper and features a self-lubricating nut, eliminating the need for lubricating oil and avoiding mess. The minimalist design requires no locking. It self-locks and stays in any position, ensuring the camera will not slide even when in a vertical position. Comes with a complimentary 60mm Arca-type quick release plate. Specifications: Weight: 339 grams Total length: 208 millimeters Rail length: 180 millimeters Travel distance: 120 millimeters Installation height: 27 millimeters Quick-release plate type: Arca-type