Complete your toolbox with the Craftsman 4 Piece Spark Plug 3/8 Drive Socket Suitable for both;Offers versatility with sizes that are compatible for numerous lawn mowers, leaf blowers, weed;Includes the following sizes: 5/8, 13/16, 3/4 and 18mm Six contact points on each spark plug;Easy-to-read markings, guaranteeing stress free use in dimly lit and grungy garages and work sites;Includes a full unlimited general warranty