Abstract: An accessory (10) for a wrench socket (12) is disclosed including a generally cylindrical magnet (32) secured to a generally cylindrical, nonmagnetic, disk (26). Accessory (10) is held within the socket (12) by snugly fitting the disk (26) formed of compressible material within the well (14) and/or by the magnetic attraction of the magnet (32) with the socket (12). The accessory (10) is removably insertable into the socket (12) of any design and model and without need for modification of the socket (12) and captures a spark plug (100) slideably received in the well (14) of the socket (12) to magnetically hold the spark plug (100) captive in the well (14) as the socket (12) is moved to the fastening location while not magnetizing the socket (12) or the spark plug (100) sufficiently to be detrimentally magnetically attracted to metal adjacent to the fastening location.