Zirconia alumina is a high performance abrasive delivering optimum stock removal performance on high powered angle grinders at higher contact pressures Abrasive: Zirconia alumina Z Grit sizes: 40, 60, 80, 120 High performance tool with aggressive stock removal performance and a very long tool life. For demanding grinding work at maximum cost efficiency. The flap disc POLIFAN® SG ZIRKON has been one of the most efficient flap discs worldwide for years. Now PFERD sets new benchmarks with the new, more efficient successor POLIFAN® Z SG POWER.Significantly longer tool life due to consistent further development and fine tuning of all componentsSubstantially higher aggressiveness throughout the entire tool lifeMaximum economic value as a result of the increased tool life and aggressiveness