Best Long Drill Bits for Cutting of 2026
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Long drill bits are an essential tool for cutting through thick materials such as wood, metal, and even concrete. These extra-long bits are designed to reach deep into hard-to-reach areas and make precision cuts with ease. They come in a variety of sizes and materials, including cobalt, high-speed steel, and carbide. Some long drill bits are also designed with a tapered shape, allowing for even more precision and control when drilling. Whether you're a professional contractor or a DIY enthusiast, long drill bits are a must-have in any toolbox.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 5 Long Drill Bits for Cutting
Drill America DWDA/CX125/16 Extension Drill Bit
The Drill America Extension Bit is made from high-speed steel, which makes it tough and durable for a variety of drilling tasks. This means you can rely on it for many general projects without worrying about quick wear. It has a black oxide finish that helps reduce friction and keeps coolant close to the cutting area, helping the bit stay cooler and last longer. The round shank design lets you use it with many different tools, adding to its versatility. Plus, its spiral flutes are designed to clear chips efficiently when drilled counterclockwise, so your work stays clean and clog-free.
1/8-Inch x 6-Inch Aircraft Extension Black Oxide Drill Bit
This set includes 6 pieces of 1/8-inch aircraft extension drill bits with a case, made from premium M2 high-speed steel, with a black oxide coating to resist corrosion. The 1/8-inch cutting diameter, 1-5/8-inch flute length, and 6-inch overall length with a 135-degree split point and straight shank make them ideal for extra reach and deep drilling applications in medium and softer materials, such as soft metal, PVC and wood.
Wensilon Extension Concrete Drill Bit Lengthening 1pcs 1/2" X 39" Cross-Type Double Thread Carbide Material Suitable
SALI Cobalt Aircraft Extension Drill Bits 20 pcs
Drill America High Speed Steel Aircraft Extension Drill Bit
This 5/16" x 6" High Speed Steel Aircraft Extension Drill Bit belongs to the DWDA/C Series. The black oxide treatment helps hold coolant near the cutting edge and reduces clogging. Its round shank allows compatibility with various tool holding systems. The right-hand cut spiral fluted tools evacuate chips up and out of the cut, making it suitable for most general-purpose applications. It is manufactured to national aerospace standard 907.
During our long drill bit for cutting research, we found 24 long drill bit for cutting products and shortlisted 5 quality products. We collected and analyzed 16,107 customer reviews through our big data system to write the long drill bits for cutting list. We found that most customers choose long drill bits for cutting with an average price of $11.40.
The long drill bits for cutting are available for purchase. We have researched hundreds of brands and picked the top brands of long drill bits for cutting, including Drill America, Drill Hulk, Wensilon, SALI. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.
Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.