Sealey AK6556 Spark Plug Socket Set 4pc 3/8"Sq Drive

Forged, Chrome Vanadium steel, 3/8"Sq drive WallDrive sockets with plug retention, external hex and polished chrome finish.
Size(s): 14, 16, 21mm, 16mm Thin Wall (for where clearance is tight).
Length: 63mm.