HIGH QUALITY AFFORDABLE REAL ESTATE YARDARM POST INSTALLATION MADE EASY! Rhino Signs is Richmond, Virginia’s most trusted company offering area Real Estate agents, firms, and brokers, yardarm post installation services. Our specially designed ground stake prevents post from leaning and are available in standard white & yellow colors. Our mission is to help our clients communicate their image and identity with the highest quality product available to the market, and at the same time provide exceptional service.