ITEM NAME:55mm Pneumatic Grinding Head for Low Speed Grinder Tire Tube Repair Tool #gib Store Home Promotion Hot Item Add to Fav.55mm Tungsten Steel Pneumatic Grinding Head for Low Speed Grinder Tire Tube Repair Tool. - Easy to use and operate, can be used with high speed pneumatic grinding tools;. -Wear-resistant and coarse-polished, which has good effect on repairing and grinding the tire;.