Half Round Diamond Needle File 16cm. | Available in seven shapes and two grain sizes offering the solution to finishing problems where material hardness makes conventional files ineffective. Plated with finely selected diamond powder, 120 – 150 mesh. | | Features and Benefits | • Solution to finishing problems where material hardness makes conventional files ineffective | • Extremely Durable – Plated with finely selected diamond powder | • Non-slip grip handle | | Typical Applications | • Can be used on tungsten carbide, ceramics, carbon, glass, fibreglass and hardened steels such as stainless steel, nimonics, titanium etc.