Star logo on odd socket

[Northwoods]

Came home today with a 1/2" drive specialty socket extension.  It is only about 2" long and has a swiveling adjustable gadget on the business end.  Two screws allow you to adjust the two projecting teeth that look similar to something that might be some sort of universal split nut wrench.  But I doubt that it is.
The logo is a small 5-point star and a light stamp:   BO.  There is a third letter that might be another O or a G.  I can't find anything in Bog that has a star logo.
Sorry; no pix.
Any thoughts?

[Lewill2]

Valve lapping, some of the valve lapping tools had ends on them like you are describing. I'm not sure on what cars had valves with indentations that would accept these tools.

[turnnut]

  Model-t FORD valves had two small indentations.

[bill300d]

Most engine mfg's way back when had either a slot or two holes for that type socket.
On the ones without a suction cup was used.

[coolford]

Bog made sockets that sound similar to what you describe.

[EVILDR235]

Any idea about the origin of the star logo ? I have some sockets with stars embossed on them, but no makers name.

EvilDr235

[bill300d]

Most likly Indestro EvilDr235.

[Northwoods]

Most likly Indestro EvilDr235.

I believe you are right. I see that star on AA Indestro sockets.

Thanks, fellows!
And here is a pic much like mine.  Mine, though, has a 1" shank and no knurling.

http://alloy-artifacts.org/Photos/tools/indestro_12dr_642_valve_grinder_adapter_f_cropped.jpg

[Bill Houghton]

Yep.  Valve grinding tool.

[EVILDR235]

I have been keeping a eye out for one of the valve grinding sockets. I have been finding a few Indestro tools lately. Just yesterday I picked a Indestro metric combo open end wrench No. 41617 in 16mm & 17mm. I don't work on BIG old engines anymore, just little old ones. I do keep tools for the older ones just in case.

EvilDr235

[Bill Houghton]

Digressing: I've got a brace bit for grinding valves - seems like a good application for short-throw brace.  It's interesting how many non-woodworking bits were made for braces; based on my reading, braces were used in most trades in the early 20th century, before they became identified as woodworking tools only.

[EVILDR235]

I got a tool flyer in the mail a few months ago with a ad for a tool that allowed one to use automotive sockets with a brace. I recently saw a lot of metal drill bits that were to be used in a brace. Someone had resharpened them on a grinder so they had a very sharp point on them making them worthless unless properly resharpened to the proper angles. I passed on them.

EvilDr235-1/2

[Twertsy]

It's Bog.  Both Bog and early Indestro used the star.  Bog usually stamped their name too, Indestro didn't.

[Bill Houghton]

I got a tool flyer in the mail a few months ago with a ad for a tool that allowed one to use automotive sockets with a brace.

Yes.  Some folks have recognized the broader utility of braces again, although I doubt we'll be seeing any new valve grinding "bits" for braces.

[coolford]

Seems braces have fallen on hard times. I bought 30 nice ones for $60.00 recently.  I make up hanging displays with them, I include a brace and 6 to 8 auger bits on a framed board and normally get $35.00 for them.  The wood is scrap that I get from a cabinet shop.