E. C. Moore's Adalox Aluminum Oxide Snap-on Disc 3/4" Coarse Grit Pkg of 200. Brand: Moore's Material: Aluminum Oxide Quantity: Pack of 200 Used For: Smoothing & Polishing Non-Ferrous & Ferrous Metals About this Item: Moore's Brass Center Discs have been the industry standard since 1898. They snap-on and off quickly and easily, with no screws to drop or lose. Moore's discs can be used with the grit side in or out and won't come off with the reversal of the handpiece. The reddish-brown Adalox discs are less aggressive than emery and feature thin, resin-bonded, flexible paper.