It is stable writing taste. Unlike ordinary clip-on, there is no button to retract the core, but it does not cause the malfunction of pushing the core by mistake while filling in, leading to ease of use.
It is Ripi item No. 1.
I purchase the color in the mood at that time.
There is no improvement point. Things like buttons that retract the clip-on core can hit the hand, and unintentionally the core was stored, but this is not the case. However, it is regrettable that there is no spare core. There is a difficulty that it can not be used if a spare core is included, which is unlikely because it is thin. A solid clip, writing taste is the best.