... , made of normal grade corundum(Aluminium oxide), medium hard bond, depressed center, black color, high speed,2 nets in the middle and ... the disc.APPLICATIONS: general purpose abrasive disc for all metal grinding applications, like steel pipe, steel bar, the burr and ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); T27 abrasive depressed center grinding wheel