Socket Size = 14mm Imperial or Metric = Metric Drive Size = 3/8 in Socket Type = Spark Plug Socket Socket Head Type = 12 point Overall Length = 250 mm Drive Type = Square
Socket Size = 21mm Imperial or Metric = Metric Drive Size = 3/8 in Socket Type = Spark Plug Socket Socket Head Type = 6 point Overall Length = 90 mm Drive Type = Square