Cougar Pro Spark Plug Socket, Socket Size: 5/8 IN, Drive Size: 3/8 IN, 2-1/2 IN Overall Length, Number Of Points: 12, High Alloy Steel, Socket End Diameter: 7/8 IN; Drive End Diameter: 3/4 IN; Depth: 1-15/32 IN; Shape: I, Meet ASME B107.1 And ASME B107.10