It is S pen of note8, but two broke in 5 months. Looking at the cross section, the plastic inside is broken like metal fatigue. I think that it is because the stress was concentrated by the warp when holding the pen at the outer joint part. I would like you to see if it is a defective product that is easily broken down by breaking the pen. I would also like to ask if it needs to be disassembled if it breaks inside the case.