Features: 1.The structure is optimized and upgraded,Adds screw holes to match more products at the same time. Double-sided fastening screws make the mounting 2. Reduce the weight of the product, relieve the weight of the arm 3. Suitable for series action camera, support customization. Applicable to full range, small ant / mountain dog / GitUp sports camera accessories 20MM rail 4. The visual effect is more refined and the hand feel is more delicate. Material: Aluminum Alloy colour: Black Package Contents: 1 x Rail Mount Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.