Folding Brackets: Thickened steel baking paint bracket, stable and not shaking, strong bearing weight. Practical and professional, suitable for home or office desk use. Easy To Install: No need to punch, no damage to the desktop, just clamp it on the edge of the table and tighten it. The c clamps hold everything tightly in place and adjust with simple hand tightening. Two Sizes Available: Standard and Large, the standard size fits desks with a thickness of 1-5 cm, while the large size is perfect for desks up to 1-8 cm thick. Multi Functional: The extended desk support creates additional space on your desk by attaching to the edge of your surface, giving you extra room for your work, correct bad sitting posture. Folding Design: Extended Desk Support is a versatile tool that provides a comfortable surface for both typing and using a mouse. Easily foldable at the bottom of the desk, space saving. Specification: Material: Steel Color: Black Size Chart: Suitable Desk Thickness: 1cm-5 cm, 1cm-8 cm Package Includes: 2 Pieces Foldable Brackets Note: Please allow slightly errors due to manual measurement and different monitors.