The NecroMech Dossier Core Manual April 2018 - Page 172
Grafts - Advantages and Penalties
Teeth and claw grafts allow a NecroMech to make a body weaponry physical attack
once per round for d10 damage.
Grafts provide immunity to the life draining effects of Ash.
Visible grafts confer a -20% penalty per graft to Action checks when using
Disguise, Seduction, Deception, and Diplomacy skills.
Conversely, they provide a +20% bonus per graft to Action checks for Interrogation.