This Arm Rest is fully adjustable, ergonomically designed - It's more than just an arm rest, it's a work platform! The padded armrest is comfortable, portable, convenient and stable (check out the tripod legs!). The tripod legs and center-post adjust from 25" to 46". The armrest work platform is a roomy 8" x 20" and is placed upon an interlocking hinge allowing it to be moved at almost any angle. Weighing a mere 7 lbs, this work horse of an arm rest is suitable for all your needs.