Restores 7200 health over 6 sec to a friendly siege vehicle or mechanical unit. (1 Min Cooldown)
30 Charges
You can use the Goblin Beam Welder's 7200 heal to heal yourself or others by dropping a target dummy or anything else it works on then switching and targeting what you want healed. The beam still goes to the dummy but heals your target.
Update - You can use it to pull mobs also works with the mechanical dragon trinkets.
So just use it on the Mechanical Dragonling trinket and you can pull mobs from max range as long as they are in los every 5mins.