Norton charger portable cup snagging wheel made from aggressive zirconia alumina grain for improved strength for all ferrous metals and metal alloys. For consistent, quality performance in foundries, welding shops, fabrication facilities, steel mills and shipyards, Norton snagging wheels maximize your productivity. Typical applications include removing flaws and cracks, removing gates, risers and parting lines, smoothing weld seams, cleaning castings, rough beveling, preparing surfaces for plating or painting. Q is hard grade.