... oxide fiber discs Thickness: 0.8MM Grit: P16-P400 Size: 100mm,115mm,125mm,150mm,180mm,230mm Fiber backing Grain Backing Diameter ... X Hole sizeGrit No. A.O. Fiber 162436406080100120150180240280320360400FIBER DISCS100MM/4. ... be kept in the package before operation.Application: Abrasive fiber discs for grinding welding, seams, removing rust, removing ...