Although Carbon Shinai have exellent durability compared to conventional bamboo ones, they could break since being used as a shinai that hits and sticks opponents. Check your Carbon Shinai before, during and after use.
If you find it to be like pictures below, stop use immediately.
Continuing use under the following conditions
is unusuaiiy dangerous!!
It could get damaged on the back side even when no scratch mark on the surface side. Always check the back side when in use.