Made of imported high-strength carbide tips, maintains excellent chipping resistance under a bad operating environment. Adopt the special tooth geometry structure to achieve smooth and steady drilling and greatly improved the service life;

The spring  with high elastic compression, so that the core material can be pushed out at the moment of drilling;

The material is made of high-strength alloy steel, and imported vacuum heat treatment equipment quenching and tempering treatment, stable quenching properties to ensure the characteristics of high strength and high toughness so that the service life of the tool can be improved;

Grinding the outer circle of the edge by the five-axis CNC machining center improves the accuracy of the edge circle of the hole saw and also guarantees the high precision aperture after drilling.