Can you help identify this 3" sanding disc?

[William Seavey]

I can score a box of these for dirt cheap, but they're worth nothing
if I can't find the right pad/adapter, and it's some proprietary type
I've never come across. Do any of you recognize it, or can you suggest
someone I might ask?

The following link is a picture of the disc with its unusual twist-
connector. Please ID if you can:
https://docs.google.com/document/d/1...hjpgB&hl=en_US

This is my first post here, so I apologize in advance if my link is
not the usual way to refer to a picture.
Regards,
Bill

[david brum]

Try here: http://www.meritabrasives.com/upload...Lock Discs.pdf

It looks like it's intended for metal working, but you never know...

[Kevin W Johnson]

These look as though they may be the same.....

http://www.packardwoodworks.com/Merc...bholdext-power

http://www.packardwoodworks.com/Merc...adiscs-power-3

[Dennis Puskar]

Kevin is right

[HANK METZ]

Try here: http://www.meritabrasives.com/uploadedFiles/SGmeritabrasives/Documents/PowerLock Discs.pdf

It looks like it's intended for metal working, but you never know...

As an aside observation, the world of metalworking crossed over some great tools to us woodworkers, the DA sander is the biggest contribution yet giving us the random orbit type we can't live without today.

[William Seavey]

Thanks guys, that's the one. I got about 80 pads (36/80 grit) for $5. Now I can get the correct handle and actually use them. Again, thanks!