Abstract: A cutting tool is disclosed which includes a substantially cylindrical body of a diameter sufficient for receiving a plumbing nipple through a first end of the body. A clamping element is provided adjacent to the first end of the cylindrical body for clamping the body to the plumbing nipple. The claimed cutting tool further includes at least one cutter, and preferably two cutters, located within the cylindrical body and mounted on a shaft which extends beyond a second end of the cylindrical body; the second end being opposite the first end. The cutting tool is adapted for rotation by the shaft which, in turn, can be attached to a power drill, or the like, so that the nipple can be cut from its outwardly directed end inwardly. The cutting tool does not itself rotate but, instead, contains a cutting head attached to a shaft which can be rotated by various rotation devices, such as an electric power drill.