886 crank weights

Does anyone know the size and type of socket/bit that it takes to remove the counter weights from the crank on an 886 with a D358 engine. A 10mm bolt head fits into the recess but feels loose. It needs to be 12 points, but is it double hex or triple square? I understand there is a difference in the two. I need to find and order one and would like to come up with the correct tool without ordering two or three times. Thanks
 
It is a 14MM triple square. IH manuals said you could use a 1/2 drive socket drive but you will probably end up damaging quite a few of them that way. The voice of experience there.

The triple square will have different angles and the minor diameter will be a little smaller that a double hex. If you were to draw larger diagrams of the two you would see the difference.
 

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