Item Type: Macro Focusing Rail Slider Material: Magnesium Aluminum Alloy Weight: Approx. 662g/23.4oz Size: Approx. 18x16x8cm/7.1x6.3x3.1in Adjustable Track Length: Both double tracks are 10cm/3.9in Applicable Model: All SLR cameras Features: Can move forward and backward, left and right Package List 1 x Macro Focusing Rail Slider 1Magnesium Aluminum Alloy Material: The main body is made of premium magnesium aluminum alloy, lightweight quality, durable, bearing up to 3kg or more. 2Metal Slide: The track adopts metal slide, gear bite, accurate transmission, exquisite workmanship, can be used for a long time. 3Precise: With precise double ruler, can accurately observe and adjust the displacement distance, support the lateral movement of 5cm, the longitudinal movement of 10cm macro stroke. 4Easy to Use: Can be mounted on a tripod, achieve the effect of pushing and pulling and transverse movement of a small range of lenses, great to shoot the middle, close and close up of people in photos. 5Perfect Adaptation: Adjustable locking device for track position, 1/4 inch standard screw for quick loader, suitable for all professional SLR cameras.