1) After checking the air, there are times when the diameter of the valve and the hole of the air chuck are tight or broken depending on the pulling angle when pulling out. 2) When inserting in relation to 1), the hole is too tight, there is a case that the air leaks without entering straight. 3) There are times when the metal fittings pushing the air valve are hanging and do not come to the center position.
People who know it is nice, but when I purchased without understanding the difference between open and closed, I heard from the person in charge of the Monotaro that I can not use it. I would like you to describe the difference clearly and describe the explanation on the product. It did not become usable.