Detailed Product Description Metal Cutting Wheels 's Material (the reinforced cutting ... discs3) T27 depressed center grinding discs4) T6 cup wheels = grinding stone The meaning of "T41 A30 ... of normal grade corundum (aluminium oxide), medium hard bond, flat type black color, high speed, 2 nets ... 2) Applications: general purpose disc for all metal cutting applications, such as normal steel pipes, steel ...