Telescopic helical design. The graphics card bracket features a telescopic screw design. The GX-30 mini provides a height support range of 26-50mm. The height is adjustable to accommodate various chassis specifications. It provides support for the rear of the graphics card. Constructed from aluminum alloy. The surface is sandblasted and anodized. Silicone gaskets are attached at the contact points to prevent contact damage to the graphics card. The bottom of the bracket includes a magnet and silicone pad. It attaches to ferrous metal surfaces, such as the power supply casing or chassis bottom plate. Non-slip rubber pads are located at both ends to assist with installation and ensure stability in the chassis. Rotating screw instructions: Rotate the telescopic screw counterclockwise to the desired support height. Then rotate the middle fixing ring clockwise to secure it. Name: Graphics Card Bracket Model: GX-30 Mini Surface Treatment: Sandblasted Size: Mini: 26x15mm / 1.02x0.59 inch, extends to 50mm / 1.97 inch Weight: 17g Color: Black Material: Aluminum Alloy Package Contents: 1 x Graphics Card Holder Note: Other items shown are not included. Color variations may occur due to lighting and display settings. Measurement tolerance may apply.