The IG-86 sentinel droid was a model of sentinel droids manufactured by Holowan Mechanicals as a subsidiary of Holowan Laboratories, the same company that created IG-88. It was designed to function as a bodyguard, or home security system for the wealthy, but was usually used for more sinister purposes.
IG-86 sentinel droids were similar in appearance to the earlier IG-series droids such as the IG lancer combat droid and later models such as IG-88. Considered to be some of the deadliest droids in the galaxy, they were more intelligent and agile than standard battle droids, able to think logically and creatively. They were capable assassins working individually or in groups.
IG-86 units were owned by Ziro the Hutt and were adorned with a Black Sun marking, like their master. One of these was KRONOS-327, which was used as a sentry droid by Ziro.[2]
Later on, three of these droids were used by Cad Bane during his capture of the Senate Building. They bore similar Black Sun markings as those employed by Ziro the Hutt, suggesting that they might have been the Hutt's personal property and not Cad's. Anakin Skywalker, who was not carrying his lightsaber at the time, destroyed one of the droids by clubbing it with its own blaster rifle.