Designed for clamping keyboard tray, the desk extension plate support can be folded after use. Made of for long time and use. It has a simple design, but very practical in use, giving you a . Also can be a good gift choice for your friends, they will like it. Features -Color:Black -Material:Iron -Size:19.00X8.40X2.50cm/7.47X3.30X0.98in Thickness range: 0.5-7.5cm - Punch free design, just clamp on tabletop and tighten, will not damage the desktop. - 90 degree folding storage, not taking up much space, low noise, strong bearing and not coming off. - to fold, comfortable to hold, easy to place, will not crack. - Adjustable screw design, the clamp can mount on different thickness table. - Simple in structure, easy to use, not easy to deform, you can use it with confidence. Package list: 2 x brackets 2 x clamps 8 x screws