Best Carbon Steel Boring Drill Bits of 2026

This 8-piece wood plug cutter drill bit set is made of carbon steel with titanium coating, ensuring a sharp and durable performance. The set includes 4 standard plug cutters and 4 four-tooth chamfered cutters, which are perfect for making tapered plugs to fill countersunk holes. The shank diameter is 9.3mm and the diameter sizes range from 1/4" to 5/8". Suitable for bench drill use, but make sure to not use it at too fast of a speed to avoid smoking and charring.

The Rocaris Plug Cutter Set offers a range of plug sizes, including 5/8 inch, 1/2 inch, 3/8 inch, and 1/4 inch, making it ideal for any project. You’ll find it easy to attach the bits to your drill, allowing for smooth and accurate plug cutting without hassle. These wood plugs fit snugly, giving your woodworking projects a professional finish by effectively hiding screw holes. The quick-change feature means you can easily switch out bits, and they fit into most power drills and hand tools, saving you time and effort.

The QWORK Plug Cutter Set offers you four essential plug sizes—5/8", 1/2", 3/8", and 1/4"—giving you flexibility for various woodworking tasks. Designed to fit most drills with its quick-change 1/4" hex shank, this set makes switching bits fast and easy, saving you time. You'll appreciate the smooth and precise cutting action, which helps you create plugs that fit perfectly into holes, enhancing the overall look of your projects. Plus, the snug-fitting plugs blend in seamlessly, giving your work a professional and polished finish every time.

The Utoolmart Wood Plug Cutter offers a versatile set with four straight and four tapered drill bits in sizes ranging from 1/4" to 5/8". This allows you to create wood plugs that fit perfectly for various woodworking projects. Made from high carbon steel with a black oxide coating, these bits resist rust and wear, ensuring long-lasting use. The set fits most round shank drills, including bench and electric hand drills, making it easy for you to center and drill accurately. Whether you're a DIY enthusiast or a professional, this tool helps with fine wood trimming, hole making, furniture building, and other wood processing tasks efficiently.

The IRWIN Plug Cutter is a handy tool designed to help you cover fastener holes in furniture, cabinetry, floors, decks, and other woodworking projects, giving your work a clean, professional look. Made from hardened, high-carbon steel, this cutter offers strong durability that lasts through tough jobs. It’s perfect for creating dowels, which are small wooden pins used to join pieces of wood securely. With the IRWIN Plug Cutter, you get a reliable tool that makes your woodworking tasks easier and helps you achieve neat, finished results every time.

The uxcell Square Hole Bit is designed for efficient woodworking. Its 3/4" chisel width and 75mm cutting depth allow you to create precise square holes quickly. The specially designed tip and four cutting corners reduce resistance, making drilling smoother and faster. Constructed from high-carbon steel, this bit boasts impressive durability and sharpness, ensuring long-lasting performance. Additionally, its long drill core simplifies locking into wood, helping you work faster and with less effort, ultimately lowering your construction costs.

The FiLwW HVAC Tool Set is an essential kit for anyone involved in HVAC system maintenance. This set includes a copper tube expander that precisely enlarges pipes to the right size, ensuring efficient connections for refrigerant or air flow. With its durable carbon steel construction, you can trust it to handle various pipe sizes without compromising performance. The compact bit holder keychain makes it easy to carry and access your tools on the go, while also serving as a handy gadget in emergencies. Remember to clean and lubricate the expander for longevity and optimal performance.

The LYNCSEDAR 6-in-1 Swaging Tool is a compact and portable solution for expanding copper tubes of various sizes, from 1/4" to 7/8". This makes it easy for you to handle different HVAC tasks without needing multiple tools. It comes with a quick-release bit holder, so you can change drill bits swiftly, saving you time and effort. The tool also features a handy carabiner, allowing you to hang it conveniently for easy access. Made from durable carbon steel, it offers strong wear resistance and high hardness, ensuring long-lasting performance for your repair jobs. This tool helps you create secure, sealed connections efficiently and safely when used properly.

The MILWAUKEE 13 PC Flat Boring Bit Set is a versatile set ideal for boring small holes in wood, plastic, plywood and formica. The heat-treated carbon steel lets you bore clean holes quickly. The drill point and cutting edges can be resharpened for long life. The set includes 2 lengths and can be used at any angle. For deep-hole drilling, you can add a 12-inch extension.

The Yakamoz Plug Cutter Drill Bits are a set of 8 pieces of high-speed steel (HSS) taper claw type wood plug cutter drill bits. With diameters ranging from 6mm to 16mm (1/4" to 5/8"), these bits are perfect for creating tapered plugs to fill countersunk holes. The chamfered cutters ensure precise and clean cuts, making it easy to create plugs for counter-bored holes. Made from carbon steel and titanium-coated, these drill bits are durable and have an extended working life. The set includes 4 standard plug cutters and 4 four-tooth chamfered cutters. With the Yakamoz Plug Cutter Drill Bits, you can easily create custom plugs for your woodworking projects, providing a professional and finished look.