Tools Metric Universal Joint Spark Plug Socket Set 3/8''D 3pc Bi Hex 7891 Laser

Socket sizes: 14, 16, 21mm; length: 100mm. Bi-Hex (12pt) sockets. Flexible joint improves access to hard to reach areas. Rubber inserts used to safely hold the spark plug in the socket without marring or damaging the plug. Manufactured from chrome vanadium.