Brass Knuckles

These close combat weapons are designed to fit comfortably around the knuckles, narrowing the contact area and therefore magnifying the amount of force delivered by a punch. They allow you to deal lethal damage with unarmed attacks. You may hold, but not wield, a weapon or other object in a hand wearing brass knuckles. You may cast a spell with a somatic component while wearing brass knuckles if you make a concentration check (DC 10 + the level of the spell you're casting). Monks are proficient with brass knuckles and can use their monk unarmed damage when fighting with them.