TCT Robust Universal Drill Bit w/Tri-flat Shank

1, TCT Extra thick robust carbide tungsten tipped with special patented stepped diamond ground angles and cutting edges for long-time drilling in various rough porcelains, ceramic, tile, metal sheet, non-ferrous metal wares, wood, chipboard, plywood, plaster, etc.
2, S4 flute design fast the dust rejection to get the higher drilling speed.
3, Special hardened steel shaft with the better straightness on the professional performance.