Can anybody please tell me what type of bolt is this? I can not find any tool to remove it.
Thanks!
Those are used in vehicles to reduce theft of the attached item.
In the case of the photograph, it is holding in a sound system, perhaps the most commonly stolen item in a vehicle.
I have only seen them in non-automotive applications where someone is using them outdoors to prevent theft.
When I enlarged the picture as big as it would go,(click on the picture, there will be a plus sign with a magnifying glass, then click on it again to get it larger still) I could not see any definition of a bolt head setting on a metal plate to hold something. It looks like a stamp that shaped the metal plate also stamped the presumed bolt head too. If that was truly a bolt, the lines where the bolt would meet the plate would be clearly defined and I would figure the metal color would at least be slightly different from the bolt to the plate.
I would have no idea why it would be made that way, but it appears to be part of the plate/bracket.