Extreme Aircraft & Precision Cleaner, 5 gal, Pail, Unscented no checkout 3M ceramic aluminum oxide abrasives 3M ceramic aluminum oxide abrasives combines high cut rate with blending ability to eliminate finishing steps Disc backup pad helps provide high edge durability for consistent finishing and long disc life Compatible across the range of hole saws Various shank sizes 3 8 inch or 1 2 in drills Short pilot drills and arbors require a 3 1 16 inch pilot bit Long pilot drills and arbors have a pass through shank Hex arbors with non slit jaw slots are positive drive dirt and more High soil capacity and superior grease cutting ability Non flammable built up grease