A High-Speed Steel (HSS) drill bit is a type of metal drill bit that is made of steel with the addition of other elements like chrome and vanadium. This enables them to be used at high drilling speeds. HSS bits are often used to drill iron, steel, and other metals like brass, copper, and aluminum alloy. They can even be used to drill plastic. HSS drill bits are hardwearing, heat resistant, and capable of safely drilling through hardwood, some metals, and plastic. They are safe to operate at high speeds (RPM) and provide long-lasting performance – as long as they are maintained. Over time, HSS drill bits can become blunt and need to be sharpened, which demands specialist tools that aren’t always available. If you’re using HSS drill bits for long periods or at high RPMs, you may need to use cutting fluid to keep the bit cool.