4558GA  

Professional type for portable and fixed drilling machines.
For carpenters, electricians, installers, etc.
Very high quality, suitable for any kind of wood. In special alloyed steel, full length heat-treatment.
Hexagonal drive for any drill spindle (only 6 mm with cylindrical shank).
Very deep and stable hollow center flute for rapid, deep and very precise boring.
Flute dents to check depth during boring (except 6 and 8mm).

Middle-size pattern.