The LEGO Technic 64179 Liftarm Modified Frame is a thick, light gray building toy that includes one piece. This frame is designed to allow for easy modification and customization of LEGO models. With its 5 x 7 open center, it provides versatility for creating intricate and unique structures. The LEGO brand ensures high quality and compatibility with other LEGO sets, making it a valuable addition to any building toy collection.