Carriers of bite are slightly special, so it can not be attached with standard hardware, but it is quite severe. I bought four U-shaped stays to chew between them and it got a good feeling if I installed them. The thing seems quite cheap. I am quite uneasy about strength. Capacity, do not enter jet type helmet. If it is a small half-bowl-shaped helmet, it is just barely necessary. On the contrary, it is just right size for a small carrier of bite, but its use is limited to kappa and accessories.