[Pretty Handle]The marking edge of drill point adopts negative back Angle design to enhance the strength of the product and the impact resistance of the product is better.
[High Quality] The Angle design of the product is determined after laboratory verification, and the drilling entry and exit are very light under the corresponding drilling parameters, no explosive edge, no burning state, and beautiful hole shape.
[Longer Life] The product has good wear resistance, greater overall strength and longer life.