Ken-Tool introduces their 5 Pc. Impact DOUBLE-DUTY Oil Drain Plug Removal Socket Set. One end is a standard 6-point socket for everyday use; flip the socket over and you have a twist socket damaged oil drain plug remover of the same size. Sockets are 3/8" drive. Socket sizes are: 14mm, 15mm, 16mm (5/8"), 17mm, 19mm (3/4").