Short length offers the greatest rigidity of the various drill bit lengths * High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling into hard materials * Titanium carbon nitride (TiCN) coating lubricates drill bits for high-temperature stability and offers better abrasion resistance than TiN coating * 135-degree split-point angles for centering and to reduce pressure on cutting edges * Round shanks, for use on a variety of tool-holding systems