Stanley STMT88994-0 1/2 Inch Drive Spark Plug Socket 21 mm

The Stanley STMT88994-0 is a 21 mm 6-point spark plug socket with a 1/2-inch drive, used to remove and fit spark plugs. Its deep design reaches into narrow spaces, and Stanley's MaxiDrive profile improves contact with the plug's hex to reduce the chance of slipping. Stanley forges it from corrosion-resistant chrome vanadium steel with a full polish chrome finish for strength and durability. A hexagonal base lets you turn it with an open-end spanner too, and the size is clearly marked. Stanley lists it to ISO 11168.