Dremel 5422 Silicone Carbide Grinding Stone 19.8mm Pack of 1

Designed to work well on stone, glass, ceramics, porcelain and non-ferrous metals.Specifications:Shank diameter: 3,2 mm Working diameter: 19,8 mmMaximum RPM: 20.000 1/min

Price: £ 2.95 from Tooled Up