It is the best for town riding with a lot of wearing and taking off. In the case of Arai Hook interferes, so I explained it to cut the tip, but my CTZ was a little hard and I managed to install it somehow. Click feeling when attached is sufficient, too.
Mounting so that the helmet can be easily detached. Installation is easy. Easy to use. However, in actual use, the metal fittings are often not easily removed (difficult). The metal fittings are thinner than the thickness of the groove of the plastic main body, the metal fittings may enter diagonally, and they are caught so that they can not come out. Although problems do not occur if you use the metal fittings properly in parallel with the body, it will be difficult to plug in precisely, as it will stop where you can not see under the chin. It takes considerably longer than the standard D-ring to get rid of it, there is no point in attaching a one-touch clip. Because I can not use it with confidence, I'm thinking of buying back to the company's part number 401 - 203, which is also handled by Monotaro.