These are brand new 3M Roloc 7480 Brown Surface Conditioning Disc Coarse quickly removes cork or paper gaskets and form-in-place gasket material prior assembling drive train components engine blocks, heads, and valve covers. Best used on steel parts.I have numerous disks available for puchase. @ $1.00 EACH*Buy one or more and stock up*Local pick up ONLY!!!*BUY NOW and Save...*Contact for more Information!