Electronica Tough Carb Limited manufactures Fused Tungsten Carbide - FTC. Electronica Tough Carb Limited supplies tungsten carbide products for the metal cutting, metal forming and mining applications. The strength & hardness of Fused Tungsten Carbide - FTC makes it useful as tough, long-life abrasive grit. It is used in matrix mixture for various applications and also for hard facing rods. The average particle size of Fused Tungsten Carbide - FTC ranges from 0.1 mm to 1 mm.