I used this to attach to a bed frame and secure a light alarm clock. The clamping part accommodates sizes from 12cm to 23cm. The maximum length when extended is 60cm, and the mounting clip is a clamp that can accommodate thicknesses up to 58mm. The following is a product description: 【 Compatible with any width, vertical or horizontal 】The screw-on clip supports thicknesses from 1 to 58mm, making it widely compatible from thin desks to thick desks. Furthermore, it can be easily assembled and installed vertically. The clip part has a built-in silicone material, so you don't have to worry about scratching your desk. 【 360-degree adjustable to any angle 】You can securely fix it using the included hex wrench! You can freely adjust the joint parts to any angle you like, 360 degrees, so you can enjoy tablet viewing at the optimal angle at any time, firmly and without shaking. 【 Usable in places other than the bed 】créer's tablet holder can be used freely not only on the bed but also on office desks, kitchens, living room tables, and various other places. For example, in the office, you can use your tablet smartly while working, and in the kitchen, you can cook while looking at recipes. In the living room, you can casually enjoy content while sharing it with friends and family. 【 Compatible with 4-13 inch devices 】créer's tablet stand for lying down supports N-switch, kindle, iPad Pro 12.9/11/10.5, iPad, iPad mini, iPad Air, Microsoft Surface Pro Series, Samsung Galaxy Tab Series, etc.