Abstract: A lock for a stereo cabinet of a type having an interior floor and two swinging glass doors meeting along a vertical line in a closed position has a toothed lock bar for mounting to the interior floor of the stereo cabinet. A toothed tip portion of the lock bar extends transversely to the swinging glass doors and intersects the vertical line. A lock cylinder block has a slot for engagement over the toothed tip portion of the lock bar. A keyed cylinder in the lock cylinder block has a pair of arcuate cam lugs which selectively move a pair of locking arms into and out of locking engagement with the toothed side edges of the lock bar tip. A pair of leaf springs bias the locking arms toward a central portion of the slot. The lock bar has a radiused end provided with a U shaped rubber bumper. One face of the lock cylinder block is provided with a rubber bumper to avoid scratching the glass doors. The lock bar is a thin flat strip which is mounted by a pair of screws to the interior floor of the stereo cabinet.