I do not usually use, but there is a convenient time to have one. Including the warped part of the lever tip part, the thickness is somewhat excessive, so if it is a tire that uses this product, it will be somewhat troublesome to insert the lever. If it stabs it will start to wake without damaging the inside of the sidewall lightly than a normal lever, but since the back of the lever comes into contact with the wheel disk or the rim before the beads ride on the mounting head due to the shape problem, auxiliary etc. Is required. There is no problem at all for use on reverse shape wheels.