Faithfull hss titanium drill bit set 16 piece high speed steel hss drills are also known by many tradesmen as jobber drills they are probably the most commonly used type of drill bit as they can drill a variety of materials quickly and efficiently this set contains 16 titanium coated hss straight shank drills the titanium coating provides two benefits it reduces friction and thus drills more efficiently it also prevents against rust these drills would be used by builders plumbers carpenters en