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100% High quality and Brand new. The gears is made from YG8 tungsten carbide steel and the rigidity varies from The hole saw has a twist drill bit inside, which is undetachable. 64HRC to 65HRC. Sharp gears and anti-cutting with lower consumption make the product a long service life. Carbide teeth for fast cutting of clean, round holes. Suitable for hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine. Cuts quick, precise holes in stainless steel, mild steel, iron, copper and brass. Can drill about 20mm depth Please noted that if you cut the hard material such as steel, ceramic tile...you need to use the oil or water to low the temperature, if not, maybe the drill bit will be broken due to high temperature, please understand Application: drill machine, do not advocate the use of drill machine. Use the matters needing attention: The knife cut materials must be fixed, not mobile, and opening into a 90 degree angle. When the positioning drill through, please wait for a moment, and then slowly drilling. In the process of operation, such as abnormal or cutting is not ideal, please stop working, to cut down on the job. Upper and lower screws do not too hard, so as not to turn the screw slide, such as the emergence of the store does not pay any responsibility. Processing thickness more than 15MM, please go to the next spring, please do not drill metal material under 1.5MM. Available in the bench drill, magnetic drill, drill, the use of pneumatic drill, drill.
