Koken 127C315-18 T Bar Universal Joint Spark Plug Socket18mm

T-type Universal Joint Spark Plug Socket Wrench - 315mm long - with Spring Clip retention.
 
The revolutionary new spark plug socket is designed to securely grip a spark plug at it's hexagonal part by two stainless spring clips.
An internal brass guide holds the clips in place, which ensures perfect alignment of the spark plug into the threaded plug hole of the cylinder head, thus preventing head damage.
The brass guide also eliminates stress loading and possible damage to the ceramic insulator of the spark plug.