Abstract: A tool for cutting a ring while the ring is lodged on a finger. The tool comprises a housing upon which a pivot arm and a motor driven circular saw blade are mounted. The tool is put to use by placing one end of the pivot arm under the ring and applying thumb pressure to the opposite end of the pivot arm to draw the rotating blade toward the ring. The blade is mounted on a high-mass, heat-conductive drive shaft which acts to dissipate the heat produced by the cutting action of the tool. Electrical cut off means are provided to turn the drive motor off when the blade has cut through the ring.