Not sure if it's dura neg or not but I'm just stating that he uses his fruit powers with that technique; As when used he has the
Scan ability activated which his VC describes as "aiming for the opponent's vital spot", the technique is also shown utilizing
Amputate ability in conjunction considering Trebol's attack was split by it.
As for whether it's a durability negating move, you could argue for it considering it
passed through Kaidou's neck seemingly without actually piercing through his skin.