PoE2
Maim
Support
Attack, Physical
Supports attack skills causing them to maim enemies.
Supported attacks have 100% chance to Maim on Hit
Place into a Skill's Support Gem socket in the Skills menu to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
PoE1
Maim Support
Attack
Physical, Support
Level: (1–20)
Cost & Reservation Multiplier: 130%
Requires: Level (8–70), (18–111) Str
Supports attack skills, or other skills that can maim enemies.
Supported Skills deal (10–19)% more Physical Damage
Supported Attacks have 30% chance to Maim on Hit
Enemies Maimed by Supported Skills take 10% increased Physical Damage

Additional Effects From Quality:
Supported Skills have (0–20)% increased Effect of Maim
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Skill Gem you wish to augment. Right click to remove from a socket.