Under Desktop Mouse Keyboard Tray Clamp Metal for Computer Elbow support for 1-5cm Thickness Description: 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. Specifications: Material: Steel Color : Black Size Chart: Suitable Desk Thickness: 1cm-5cm, 1cm-8cm Package Includes: 2 Pieces Foldable Brackets