LeadYourLife&reg; Ergonomic Adjustable Computer Armrest Forearm Support with Mouse Pad, Chiar armrest extender (Black) Compact, intuitive, comfortable Computer Arm Rest Support (450mm) Helps to promote healthy blood circulation Reduces tension and fatique in the neck and shoulder muscles Ergonomic designed for office White-collar worker and so Computer Arm Rest is easy to assemble, no need any other tools.