Not sure if this is a bug or intended. But the attack speed of nail knuckles is in the 160s, instead of the 80s for the unarmed, or 80s for just nail knuckles (1 chest encumberance). Speed seems to be the weapon speed+unarmed speed
Nail knuckles have a bad habit of sticking to the stuff you hit. They have no cutting damage type flag set, meaning they count as improvised weapons for the purpose of sticking to stuff.
oh yes hehe, my bad