Masterwork

Masterwork Weapons
A masterwork weapons is not technically magical, just an high-quality item. Because it was made with such skill, wielders of masterwork weapons receive a +1 bonus to hit.

Masterwork Armor
A masterwork piece of armor is not technically magical, just an high-quality item. Because it was made with such skill, it isn't as cumbersome, reducing the Armor Check Penalty by 1.