Features: 1. Double end hex spark plug socket: one end is 16mm, and the other end is 18mm. 2. Simple to use, acceing it to reach plugs without problem. 3. Special tools for manual disaembly of the spark plug. 4. Mulfonctional, works perfectly to unscrew the nut. 5. Made of high quality of carbon steel, durable and strong. Specification: 100% brand new and super high quality. Item Name: Double End Spark Plug Socket Material: carbon steel Size: 80*18*16mm/ 3.15*0.7*0.63inch Color: As Shown Package Includes: 1Pc Double End Spark Plug Socket. Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color which is showed on the pictures. 2. Please forgive 1 cm/0.39"-3 cm/1.18" measuring deviation due to manual measurement.