An oil rig, also known as a dab rig, is a water pipe designed for vaporizing concentrates, oils, or waxes. It features a water chamber, a heated nail, and a mouthpiece. Users heat the nail, apply the concentrate, and inhale the vapor for a smoother and more flavorful experience compared to traditional smoking methods. Oil rigs come in various styles and sizes to cater to different preferences and dabbing experiences.