Hole Saw and Method

摘要: A breakage resistant hole saw that reduces damage of the pilot drill bit caused by sudden contact cutting teeth on saw's body against hard working surface after has penetrated through surface. The disclosed herein includes a cylindrical mounted an arbor. Formed circular lower edge is plurality angled cut when rotated in one direction. Mounted end arbor with spiral flute configured at angle to penetrate direction opposite body. Also method for forming using bit.