Most brown wall plugs are 7mm in diameter, so to drill a hole for a brown plug, you will need a 7mm drill bit. SDS plus shank - This is another type of slotted drive system. It’s used for most masonry drill bits. Twist bits work best for drilling in a myriad of materials when the target is a hole diameter of 1/2-inch or less. As you move beyond a 1/2″ hole diameter, you move away from traditional twist bits into some different options. Spade Bits We know we didn’t cover every category of hole-making accessories like hole saws and didn’t touch driver bits, either. While we chose to draw the line where we did, keep your eyes open for more buying guides to cover those accessories down the road! Disagree With Our Choices?

Auger bits have a threaded tip that pulls the bit forward as it rotates in the wood. Its strong, full-fluted design also makes it easier to drill nice and straight. Step Bits A HSS drill bit is made from high-speed steel, as described in the materials section above. It’s often used in multi-purpose drill bits as it can be used on wood, plastic and metal. HSS drill bits are also the best drill bits for soft metals.Milwaukee updated these bits with Enhanced Tapered Web. This new core design strengthens it with better flute durability. White wall plugs can vary in diameter (6-10mm). So, to drill a hole for a white wall plug, you will need a drill bit that’s the same diameter as the plug you choose. We’ll provide more than 500 pieces of new content this year absolutely free for our readers—including objective evaluations of individual tools and products. Most red wall plugs are 6mm in diameter, so to drill a hole for a red plug, you will need a 6mm drill bit. High-speed steel: made from carbon steel with chromium and vanadium additives. It’s suitable for drilling wood, plastic and soft metals.

Tungsten carbide: made from a mix of tungsten metal and carbon. It's even more hard-wearing than the standard carbide above. It is suitable for drilling into extremely tough materials such as masonry. Hex shank - A hexagonal-shaped shank used in screw guns or electric screwdrivers with a hammer mode.

The best drill bits for metal, and particularly for carbon steels, goes to Milwaukee for their excellent cobalt bits. Just like their titanium bits, they have the Red Helix variable flute design. They also have a 135° QuadEdge Tip that helps it drill much faster than other cobalt bits we tested and still keep the walking to a minimum. One of the most cost-effective is a spade bit. Sometimes called a paddle bit thanks to its shape, spade bits throw chips out as they cut rather than sending it up through the flutes. It makes for a much cooler slow-motion video but generally leaves a larger mess. Unlike your standard twist bits, spade bits are really only good for making holes in wood. Auger Bits

Kenny’s life around power tools started early. His grandfather was an airplane mechanic in WW2 and took up woodworking as a hobby after retiring from the power industry. Building everything from bookshelves to lazy Susans, he became extremely accomplished while his young grandson observed, fascinated at the way raw wood could turn into something both beautiful and functional. In fact, Kenny still uses several pieces that his grandfather made more than 30 years ago. TiAIM: a titanium aluminium nitrate coating that increases resistance to abrasion and heat on drill bits designed to cut metal. The drill bit size you need for a wall plug will depend on which wall plug you use. Generally, you’ll need a drill bit that’s the same diameter (in millimetres) as the wall plug, but for accuracy, you can drill a pilot hole using a slightly smaller size drill bit first.When the tips on these bits dull, consider sharpening them since cobalt runs throughout the steel. Avoid using them when you don’t need them to prolong their life for when you do. When you’re looking for the best cobalt drill bits for the money, the 15-piece kit presents a compelling option. Cobalt: an incredibly strong alloy metal used to drill through tough materials. It can withstand heat and resistance and is the best drill bit for stainless steel. Flutes: a spiral channel that runs from the cutting lip to the shank. It helps to remove the material as it’s cut from the hole. Grey wall plugs can vary in diameter (6-14mm). So, to drill a hole for a grey wall plug, you will need a drill bit that’s the same diameter as the plug you choose. A drill bit is a cutting tool that’s fitted into a power drill and used to cut holes in materials. They come in a wide variety of shapes and sizes, but they all have similar parts as follows: