ITEM NAME:38mm Car Tire Repair Grinding Head Coarse Polish Buffing Wheel With Linking S Kw.70 grid abrasiveness coarse buffing for good effect of tire repair grinding. 1 Linking Rod. Grinding Head Size: 38-40mm / 1.49"-1.57". 1 Buffing Wheel. Thread Size: 9mm / 0.35in. Suitable for most of tire repair works.