... Annular cutter (core drill) is the very product developed and produced by our company. Annular cutter, hole saw, ... like steel plate, Copper, aluminium, cast iron, stainless steel and plastic. 5. The specifications from the Φ12mm to Φ65mm ... steel structure project, railway traffic, bridging, shipbuilding, machine manufacture, aviation and spaceflight. drilling machine for Cutting tools HSS core drill