Twist drills are the most widely used of all drill types. They can be used to drill anything from wood, plastic, steel, and concrete. Twist drill bits are most commonly used for metal drilling, and most of the twist drills are made of high-speed steel and carbide steel.
Carbide twist drills are made of cemented carbide, which is a hard material widely used as cutting tool material and other industrial applications. It consists of cemented carbide fine particles, which are bonded into a composite material by a binder metal.
Most of the time, carbide twist drills will leave a better surface finish on the workpiece and will be processed faster than high-speed steel twist drills.
Carbide twist drill bits usually have superior performance for drilling hard materials (such as carbon steel or stainless steel) and other cutting tools that will wear faster (such as high-volume production).