High precision CNC 3-6 axis small-hole EDM drillers. For drilling Φ0.1-0.3mm-3.2mm inverted cone mirco holes in complex spatial structure. Conical degree of micro hole adjustable. Multi-axis motion for machining mirco holes, grooves and narrow slits. Widely used for machining automobile nozzle, medical equipment parts and aerospace mircro hole parts etc.