These twist-knot flat brushes are designed for heavy-duty work and delivers aggressive stock removal on ferrous metals. The brush is made from hardened steel wire, which gives a high level of durability and performance. The twist-knots are tight for a longer life and the twisted construction is perfect for quicker material removal in deburring and cleaning tasks. The flat shape is designed to work perpendicular to the surface, making it ideal for smaller and tighter areas. Compatible with most angle grinders with an M14x2 connection.