What is shown in the image is a billet of aluminum that has been machined using modern CNC (computer numerical control) practices. It was designed usi Show moreWhat is shown in the image is a billet of aluminum that has been machined using modern CNC (computer numerical control) practices. It was designed using SolidWorks, a particular CAD (computer-aided design) software suite. In another piece of software, MasterCAM, this digital model was converted into a language interpretable by the Haas vertical end mill used to machine the final piece. Subsequent to machining, it was painted and buffed before inserting the tiny ball bearing and attaching the acrylic face. The opposite side actually has a maze, so the ball can travel between the two faces via the centrally located through hole. Show less