The reduced-shank drill bits in these sets have a black-oxide finish that retains lubricants to improve the bits' wear resistance and chip flow. Black-oxide bits should only be used for drilling ferrous metals. These bits are made from high-speed steel. They provide more flexibility and absorb more shock and vibration than cobalt drill bits, making them suitable for use in manual drilling machines and handheld power tools. They may leave a rough finish on the hole. These sets contain multiple drill bits in a range of sizes.

The reduced-shank drill bits in these sets have a straw/bronze finish that improves the bits' wear resistance. The bits are made from cobalt. They tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel reduced-shank drill bits. They provide some shock absorption and can be used in handheld power tools. These sets include multiple drill bits in a variety of sizes.

The reduced-shank drill bits in these sets have a black-and-gold finish that lubricates the drill bit and provides some resistance to wear and rust. The bits are made from high-speed steel and provide more flexibility and absorb more shock and vibration than cobalt drill bits, making them suitable for use in manual drilling machines and handheld power tools. They may leave a rough finish on the hole. These sets contain multiple drill bits in a range of sizes.