Snap-on Tools USA NEW 6 Piece 3/8 Drive. Essential #2 Spark Plug Socket Set. Rubber insert style retention. Comes with plastic tray. S9718KA = 3/4 6 Point Shallow. S9711KA = 18mm 6 Point Shallow. S9716KA = 9/16 6 Point. S9714MKFUA = 14mm 6 Point Swivel. S9716KFUA = 9/16 6 Point Swivel. S9714MKS = 14mm 6 Point.