180mm Z36 Fibre Disc CS565 Zirconia - KLINGSPOR Zirconium fibre backed discs are outstanding for rough grinding, sanding, de-rusting, de-burring and working of welding seams in mild and stainless steel. These discs can also suitable for precision finishing work on metals. * Low Clogging Rate * Above Average Long Service Life * Even Grinding Finish * Cool Grinding