I bought it for the on-board tool of my bike. It is very useful because socket 8 · 10 · 12 mm and hexagon wrench 4 · 5 · 6 mm become one. It is mounted on the car along with another socket according to my bike. Although it can not apply a large torque, it can be used without problems if first aid measures or light maintenance. Because the price is about 800 yen, I think that I will purchase again if I lose it.