Get the material straight from the authorised stockist Drills can be divided into the following cateogries. Parallel Shank Twist Drills Jobber SeriesParallel Shank Twist Drills Stub SeriesParallel Shank Twist Drills Long SeriesParallel Shank Twist Drills Extra Long SeriesTaper Shank Twist DrillsTaper Shank Twist Drills Long SeriesTaper Shank Twist Drills Extra Long SeriesTaper Shank Core DrillsCentre Drills, etc