In Dead Island Riptide, there are but three classes of weapons that count as hand-to-hand weapons: brass knuckles, bronze knuckles, and claws.
John Morgan, the hand-to-hand specialist, has a skill called "One-handed weapon durability". You can guess what it does. Because of John Morgan's focus on hand-to-hand weapons, I'm curious if this skill applies to those weapons?
The hand-to-hand weapon is only shown on one hand, but he swings with both fists, and I don't believe that the weapon only applies half the time like that.