A dab rig is a type of water pipe that is designed to be used with cannabis concentrates. Unlike traditional bongs, which are used with dry herbs, dab rigs are used with oils, waxes, and other forms of cannabis concentrate. Dab rigs typically consist of a mouthpiece, a chamber, a nail, and a dome. The mouthpiece is where you inhale the vapor, and the chamber is where the smoke is produced. The nail is part of the dab rig that is heated, and the dome is placed over the nail to trap the vapor.