Medium flexibility grinder pads ideal for standard use. They feature a threaded metal insert moulded into the pad as well as the removable locknut. Made in Great Britain Type 171-XU To suit 178 mm Angle Grinders. Thread 5/8 x 11 UNC. Abrasive Disc Size 178 mm x 22 mm (7in). Machines Fitted. 5/8 UNC Internal Thread and quick release lock nut. Atlas Copco, CP, Compare, Desoutter, Ingersoll Rand, Kango, Wolf 4157. Pin Spanner - Blue