Another 'screwdriver tip' wrench w pix

[Sawduster]

I'm starting a new thread instead of hijacking Wrenchmensh's similar one (http://www.papawswrench.com/vboard/index.php?topic=2754.0).

At first glance this is a simple double open-ended wrench.  There is, however, what appears to be a short, wide, <<thick>> screwdriver blade shaped tip at 90 degrees to the handle.
Overall length is 6 1/2", with a 1/2 inch and 7/8 inch end, with the protrusion in question on the side of the grip on the 7/8 inch end.
The only marking is K99.

It's been suggested that the tip could be a shackle spreader, but it would have to be a very small shackle and the short length of the wrench wouldn't provide much leverage.

Ideas as to purpose of 'blade' and, of, any other info, anyone?

[keykeeper]

Probably used to spread the end of a pitman arm, similar to this http://www.papawswrench.com/vboard/index.php?topic=2787.msg16808#msg16808

[Sawduster]

That's exactly the way it seems to work - like a pry bar.  Who'd a thunk it!  I vaguely remember learning NOT to use wrenches like that.
That's a great link you sent.
The tip appears smaller than the one in the link, but for exactly the same purpose. 
Thanks.
Other comments still welcome.