Description: 1/4" & 3/8" screw hole, universal for Arca Swiss tripod head quick release plate, DSLR cameras, camera lens clamp mount. 2-way, 160mm total ength, 115mm fine-tuning control range, adjustable sliding speed (quick or slow). With gear / knob control & 115mm index scale (in millimeters). Accessory for camera lens macro photography support kit. Made from aluminum alloy material, light weight and durable. Specification: Material: Aluminum Alloy Size: 21.2x4.8x3 cm/8.3x1.9x1.2 inch Package Includes: 1x Tripod Rail Slider Plate
