4 Way Macro Focusing Rail Slider with 1/4" Mounting Screw for Close Up Shooting Features:<br style="white-space:normal;"> Universal 1/4in mounting screw is compatible for most brands of digital and DSLR&nbsp;cameras. Mainly adopting premium plastic, sturdy structure and durable for use. Smooth rack and pinion movement provides accurate and fast adjustment of the rail. It allow movement in four directions, right, left, forward and backward, with&nbsp;precision scale to get quick focusing. Perfect for close-up shooting and hep to position camera and focus on subject with&nbsp;high precision. <br style="white-space:normal;"> Specification:<br style="white-space:normal;"> Condition: <br style="white-space:normal;"> Main Material: Plastic<br style="white-space:normal;"> Color: Black<br style="white-space:normal;"> Screw: 1/4"<br style="white-space:normal;"> Size: Approx. 18 * 16.5 * 9cm / 7.1 * 6.5 * 3.5in<br style="white-space:normal;"> Weight: Approx. 414g<br style="white-space:normal;"> <br style="white-space:normal;"> Packing List:<br style="white-space:normal;"> 1 x Rail Slider<br style="white-space:normal;"> * Camera and other devices are not included.