Airkoul Spark Plug Socket Thin Wall 3/8" Drive 12 PT Point 14mm For BMW E90/E92 3 Series Special thin-wall spark plug socket required to service the plugs on many late-model BMW application 12-point plugs (N43 N52 and N54 engines) Used for the spark plugs which produced by BOSCH and new model vehicle. Special leaf spring design to clip the spark plug Size: 3/8x14mm (12PT)