4pc 3/8in Dr Spark Plug Socket Set with Universal Joint is designed to suit a variety of spark plugs, this set includes 4 different socket sizes (14mm, 16mm, 18mm, and 21mm). Spark plug accessibility and removal in confined spaces are made simple by the 3/8in. drive with universal joint. Durability and strength are provided by the chrome vanadium construction.

• Sockets: 14, 16, 18, and 21 mm
• 3/8" drive size
• For difficult-to-reach plugs, a universal joint
• Constructed of chrome vanadium for toughness and endurance