Made of high quality ABS material with padded memory foam, the sturdy clamp fits desks up to60 mm/2.4", Comfortable, the non-slip fabric on the surface contains amemory foam material, it is very comfortable to use in summer and winter. Mouse pad with rotating desk arm support, Space saving for desks, Platform rotates 180 degrees to hide it under the desk, Easy to use from multiple angles and can be rotated under the desk when not in use'is not used. Ergonomic Elbow Support for Office Hands Shoulder Protect Armrest Adjustable Swivel Mouse Pad for Office Easy to attach: with the screw clamp it can be installed without any tools. Armrest for work/study, reduces arm pressure and eliminates muscle tension in the neck, arms and shoulders. Best to use both together Can be used on a stool Use on the table Adjust the angle as you like