Def Lock, or Defense Lock, sometimes known as Iron Skin, is one of the many recurring Skill Trees in the Monster Hunter series. This Skill Tree first appeared in Monster Hunter Portable 3rd.


Def Lock has appeared in the following games:

Monster Hunter 3 Ultimate

Skill Tree Skill Name Points Skill Description

Def Lock

Iron Skin
+10 Negates the effects of Defense Down.

MH3U Equipment with Def Lock

MH3icon-Helm Head MH3icon-Plate Torso MH3icon-Gauntlets Arms
MH3icon-Waist Waist MH3icon-Leggings Feet ItemIcon017 Decorations