The 16-18MM spark plug deep reach socket spanner you described appears to be a well-designed and versatile tool that can greatly assist in spark plug maintenance and various other automotive and motorcycle repair tasks. Its dual-size capability, extended reach, and ergonomic design make it a valuable addition to any mechanic's or DIY enthusiast's toolkit. Package included Ignition Spark Plug Spanner Deep Reach Socket Wrench Tool with TommyBar1 Two Sizes on 2 Ends With 16mm and 18mm sizes on both ends, this tool can accommodate the most common spark plug sizes used in both automobiles and motorcycles. generators and other outdoor equipment SpecThe 15cmlong wrench provides a comfortable grip and leverage for turning the socket, while the 13cmlong Tommy bar also known as a Tbar or handle allows you to apply torque efficiently. Fuction This thin walled spark plug remover work excellently was able to remove the old sport plug an insert a new one very quickly.This specialized tool designed for removing and installing spark plugs in an automotive engine. Comfortable to Use Ergonomic design, comfortable hand feeling, compact, lightweight and portable. 1618mm ignition spark plug spanner wrench socket is an essential tool for maintaining a vehicles ignition system and ensuring that spark plugs are properly installed and removed without causing damage or improper sealing.