Main application Magnetic spark plug head attracts the plug quickly and holds it securely during installation or removal, reducing the chance of dropping or loosening. The head rotates 360 degrees for easy access in tight spaces. Wide application and kit contents Suitable for spark plug changes on vehicles. The kit includes 3 star bit sockets (T20, T30, T40) for bicycle, motorcycle repairs, and equipment installations. Also included is a 9.8 inch extension rod for hard to reach areas. Precise operation 3/8" drive click torque wrench with 14mm and 16mm spark plug sockets. High accuracy (±3%) ensures safe, precise tightening to the exact specified torque. Durable construction Made of chrome vanadium steel, offering wear resistance and long service life. 2-3 use scenarios - Changing spark plugs on cars or motorcycles, with accurate torque and secure plug retention during removal. - bicycle or equipment repairs that require star-bit fasteners (T20, T30, T40) and a magnetized plug driver. - Working in tight or hard-to-reach engine compartments thanks to the 9.8 inch extension rod and 360-degree head rotation.