Miniature cutting tools designed for machining very tiny slots or cavities. These delicate cutters are made of anti-breakage tungsten carbide rods. So they will not easily break when creating very tiny narrow slots on steel, even when the effective length is three times of the cutting diameter. Precisely ground by Swiss high-end tool grinders, the dimension and geometry of these miniature endmills are very precise and reliable, the total quality is never comprised due to smaller form of shape.