This unique range of HSS Taper Shank Drill bits are designed to cater for all engineers drilling needs and offer a solution to all drilling problems where other drills cannot cope or stand up to modern manufacturing speeds and methods. High Speed HSS Taper Shank Drills are primarily for drilling in the following materials such as Alloyed and Non alloyed Steel, Soft Stainless Steel, Soft Cast Iron and Aluminium.