ITEM NAME:55mm Steel Pneumatic Grinding Head for Low Speed Grinder Tire Tube Repair Tool Product Description Description: 55mm Tungsten Steel Pneumatic Grinding Head for Low Speed Grinder Tire Tube Repair Tool Features: -Wear-resistant and coarse-polished, which has good effect on repairing and grinding the tire; -Tungsten alloy with high strength and durability; - Easy to use and operate, can be used with high speed pneumatic grinding tools; - Suitable for most tire repairing; Specifications: Material: Tungsten steel Grinding head size: 55mm/2.17" Gross weight: 112g Included: 1 x Pneumatic Grinding Head 1 x Connecting Rod.Easy to use and operate, can be used with high speed pneumatic grinding tools;. Included: 1 x Pneumatic Grinding Head. -Wear-resistant and coarse-polished, which has good effect on repairing and grinding the tire;.