... fibre as backing, and bonded with the abrasive cloth closely.more flex and strong, and consistent finish. Suitable for flat welds, angle ... welds and so on.Application:Weld grinding, surface preparation, blending, cleaning,deburring. (Note:Flap discs are ... , 180*126*22.4Recommended speed:70m/sGrit:46#-320# Abrasive Flap Disc with Fiberglass Backing