This keeps the drill bits from being nicked or scratched and also provides excellent organization. Most drill bit sets are sold in a case with space to hold each bit in place.

High Speed Steel (HSS): Standard general purpose bits with a polished finish with silver appearance.

Gold Oxide: Offers added speed and durability for general purpose drilling applications in wood, metal and plastic and drills 3x faster with speed helix.

Black oxide bits have 50% longer life than standard high speed steel bits.

Black Oxide: High speed steel bits with an added heat treatment that reduces friction between bit and workpiece.

Cobalt bits are not designed for general purpose use. Cobalt bits are specifically designed for drilling very hard, abrasive materials such as treated stainless steel, titanium and cast iron.

Cobalt: Cobalt bits are a special formulation of high speed steel with cobalt added in to withstand very high drilling temperatures.

Titanium coated bits last up to 6X longer than standard high speed steel bits. This special coating gives the bits a very high surface hardness to help penetrate tough materials, makes the bits highly corrosion resistant and significantly reduces friction between bit and workpiece.

Titanium: High speed steel bits which have been coated with titanium nitride.

General-purpose rotary drilling most common drill bits for home use.Useful for home repairs, maintenance and building projects with metal, wood or ceramics.Twist drill bits can be used on light metal, wood, plastic, metal, ceramic and masonry.

This generally means that they have not been used to cut hard materials such as steel. Although they are designed for cutting metal, they will work quite well in wood, if sharp. At diameters up to about 1/2', twist drills are not only the cheapest of all bits a woodworker could use, they offer the widest selection of sizes. They are most frequently used for metal cutting, so they are generally made from M2 high-speed steel. Twist drills (also commonly referred to as twist bits) are the most widely used of all drill bit types they will cut anything from wood and plastic to steel and concrete.

Magtool bit