Perfect for finishing metal For use with brass, copper, silver & Aluminium Ideal for latter stages of buffing 4 Sided ImpressArt High Polish Finishing Blocks offer a helpful solution to finishing your designs. Supplied in a fine and extra fine grit, these 4-sided finishing blocks should be used as the third and fourth stage of buffing or as a quick solution to cleaning your designs. The fine grit is suitable for quick polishing whilst the extra fine grit is ideal for creating a highly polished finish. The blocks have an effective working area measuring 90mm x 35mm approximately and can be used with various metals including; brass, copper, silver and aluminium. Please note - for optimal finishing, it is always advised to work down the grade of grits. Medium and Coarse blocks are available.