Boyer-Shultz question

When I picked up the two Boyer Shultz surface grinders last week, inside one of them was a tackle box with a factory lable that said
Boyer-Shultz High Speed Grinder Attachment.
Inside was an attachment that bolts to the end of the grinding spindle, a large pully to replace the regular stone and a high speed spindle that takes 1/8" shank grinding wheels/stones. Given the size ratios, it must turn that dremal style grinding point at least 20k rpm
What is this used for? Is it of any value? Does anyone need one?
Gunner
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That would be a handy little item to grind narrow slots, etc.
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Anthony

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its for grinding internal diameters or small slots with small stones
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