Hole cutter, also known as hole saw or hole saw, refers to a special circular saw for circular hole processing in modern industry or engineering. It is simple and flexible to operate, convenient to carry, safe and widely used. Hole opener (cutter) installed on the ordinary electric drill, can be easily in copper, iron, stainless steel, plexiglass and other plates of the plane, spherical and other arbitrary surface of the round hole, square hole, triangle hole, straight line, curve arbitrary cutting
