Easily attaches to a computer desk up to 4.8cm (1.9'') thick. The weight of the forearm is distributed over a large area. This reduces localized pressure on the wrist and eliminates the constant strain on muscles in the neck, arms and shoulders that so many computer users experience.Behind its simplicity, the pad hides a few useful tricks. It can be adjusted to the desired position and while the forearm is placed on top the pad locks itself in place.It allows for stability when using a mouse. When not in use it can be turned completely sideways allowing an easy access to the chair. An interesting feature of the pad is that the pad can be easily lifted and completely removed.The pad is our most affordable armrest. It's a great addition for keyboard use as well. Two units can be installed (one on each side of the keyboard) to give complete support to forearms.The armrest is extremely portable and installs simply and quickly. It can be disassembled in seconds and can easily be carried in a briefcase or computer bag. The pad has been extensively tested for strength and we are confident that under normal use, it will not crack or break. Specification:Material: Strong ABS PlasticColor: Red, Black,Yellow Size: 30x15.5x5cm/ 11.8x 6.1x 1.97inchPacking Includes: 1 x Attachable Arm Holder