when i bought an abrasive and store it in my garage .By the humidity moisture or whatever -- it always turn from a flat sheet to the circle roll it make me frustrated. So I try to find out how to organize and kept it flat.
Thing to make
- plywood ( as a back plate)
- wood / drywall screw
- zinc plate
- utilities plier
- drill machine
I look up for a scrap and I finally use a file fastener ( I'm not sure what does it call but it use to attach in the center of the file )
then I hack it and screw in to a back plate that i use 2*1 plywood. After that i made a cover with Thin a zinc plate FINISH !!
i also made an index by the grit number
It Simple but hope you like it :)