These high speed steel drill bits are manufactured with a titanium nitride coating for enhanced strength and longer life. Fully ground with a 135 split point for precise centring to prevent drill wander. Draper Titanium Series drill bits work best in conjunction with a cooling agent. Suitable for use with steel, non-ferrous metals, wood and hard plastic. Compatible with a standard 10/13mm chuck. Sizes 1.0-13.0mm. Supplied inside a plastic case.