A Miller. as we call it, is essentially an Angle Grinder with a CARBIDE TIPPED MILLING BLADE attached to it. The company chooses for obvious reasons use the Metabu Brand giinder .lt has a clinch buih in to the mechanism which allows for some slippage of the blade, if put in a bind, thus dramatically reducing the possibility of an uncommllahle Kickback. The Miller is used to cut a and shape Aluminum components. Note: The miller is one of the most useful and versaiilc pcwer tools for Aluminum fabrication, yet it is pmentially one of the most DANGEROUS if not used prepetly and according In Company guidelines.