Dormer Tieflochspiralbohrer DIN/ANSI Typ A920 Nenn-Ø 4.5 HSS-E Zylinderschaft

High Speed Cobalt (HSS-E) provides superior hot hardness when drilling 130 degree special point provides self centering, low thrust and easier penetration Parabolic flute design aids swarf removal and cooling when drilling long chipping materials Bright finish helps prevent built-up-edge when drilling sticky materials Precise grinding enables hole tolerances of H9 to be achievable