I have a question regarding material bonuses (damage, quality, etc...):

When using materials that offer a bonus, does the bonus have to apply to the item or the user of the item?

i.e.: I use iron screws (damage bonus) to craft bone armor. Does my character deal more damage, or should I have used the screws to craft a weapon (damage bonus applied to the weapon, not the person)? Same thing for materials that offer a quality bonus - if I apply the BRASS fasteners to my closths, will I craft better quality items or should i use the brass to craft tools in order to pass on the quality bonus?

I hope folks understand this question.

Thanks in advance.