This Dunnet Tools T-handle Spark Plug Remover Kit Makes Spark Plug Changes Easy And Simple. The T-handle Allows For A Greater Transfer Of Torque Making Removing The Spark Plugs Require Less Effort And The Handle Itself Has Been Dipped To Make It Anti-slip. The Handle Features A Flexible Head Design, So Even In Tight Confined Areas, You Can Still Use The Maximum Torque Of The Tool To Remove Any Spark Plugs. The T-handle Has A 3/8" Square Drive, Meaning Any Normal 3/8" Sockets Will Fit. Included Is Three Spark Plug Sockets In The Sizes 16mm, 18mm And 21mm. These Are Made From Chrome Vanadium. The Sockets Included With This Removal Kit Feature A Rubber Insert Which Will Grab Onto The Spark Plugs And Ensures Easy And Hassle Free Removal From The Engine. Technical Specification: T-handle 3/8" Square Driver With A Rubber Dipped Handle For Extra Grip. Features A Flexible Head For Engine Bays With Tight Clearances For Removing Spark Plugs. Dunnet Tools Offer A One Year Warranty Included With This Tool Set.