Comfortable to use non-slip dipped handle. 360 rotation, suitable for most models, turning to the ferrule, more convenient to use. T-Handle Bar allows larger Torque force and high pursuance. Come with 16mm (5/8") 21mm (13/16") Sockets fits most Spark Plugs (Please confirm size of spark plug prior to purchase) Flexible head allows access to confined areas. Plastic coated T handle - allows a good grip. T handle has a 3/8" drive fitting that can be used with any 3/8" drive Socket. Socket made from chrome vanadium steel. Built-in high-strength apron, easy to use at multiple angles, wider range of use. Comes with a widespread joint function for enhanced access. Suitable for fastening and demolition of the spark plug sleeve.