The name Ergotron is derived from the words Ergonomics and Electronics. As the name suggests, Ergotron's mission is to improve the human interface with innovative, high-quality products.This product is a Grommet Mount Base for 1-1/2" Round Pole which attaches to Work surface through hole 3/8" to 3" (10 to 76 mm) wide, up to < 4" (102 mm) thick.