Best 24 Inch Long Drill Bits for Metal and Beyond
Finding long drill bits that can handle metal and hard materials can be a challenge. This guide highlights 24-inch options and other extended-length bits that are commonly used for metalworking, steel, and tough projects. Each product section provides key features, material compatibility, and practical usage notes to help you pick the right bit for extended reach, precision, and durability.
Summary of chosen products: HLOFIZI 1/4” x 24” Long Drill Bit; HLOFIZI 1/2” x 24” Long Drill Bit; Jonard Tools DBF-1424 High Speed Steel Flex Bellhanger Drill Bit; WOBLLMX 1/4″ x 24″ Auger Drill Bit; Drill America 1/4″ x 18″ High Speed Steel Extra Long Drill Bit. The collection emphasizes long reach, stability, and robust steel construction for challenging drilling tasks. Each item appears in the product sections below with specific features.
HLOFIZI 1/4” x 24” Long Drill Bit
The HLOFIZI 1/4” x 24” Long Drill Bit is a single-piece installer bit designed for wood, including wood with nails. It has a 90-degree split point intended to speed up drilling and reduce walking. Made from premium high carbon steel with a black oxide coating on the flutes, this bit aims to resist high heat and corrosion. While primarily marketed for wood applications, its length and solid construction make it a candidate for extended-reach drilling tasks where metal isn’t a factor or where wood frames and similar materials are involved. Use with compatible drill chucks that accommodate long bits to maximize performance.
Key features: non-flexible construction; 1/4 inch diameter; 24 inch length; split point for faster starts; black oxide coated flutes for heat resistance and rust protection. This bit is best suited for tasks requiring a long reach in wood environments, with reliability for heavy-duty or nail-containing wood projects.
VALYRIANTOOL Cobalt Extra Long Drill Bits Set (5PCS)
This 5-piece cobalt drill bit set delivers extended reach with 12-inch bits in 1/8″, 3/16″, 1/4″, 5/16″, and 3/8″ sizes. The bits use M35 cobalt high-speed steel, offering enhanced hardness and wear resistance over standard high-speed steel. With a fully ground process and a 135-degree split point, these bits resist walking and clear chips efficiently. The 135-degree tip design helps maintain accuracy when starting holes, especially in stainless steel and hard plastics. While the longest length is 12 inches (not 24), the cobalt alloy and precise geometry make these a solid choice for deep drilling tasks in metal, wood, and plastic where reach does not exceed 12 inches.
Key features: 12-inch length; M35 cobalt alloy; 5% cobalt for durability; fully ground with 135-degree split point; compatible with a broad range of materials; no center punch needed. The cobalt composition stands out for metal drilling, including stainless steel, aluminum, and harder plastics.
1/4″ x 24″ Auger Drill Bit for Wood
The 1/4″ x 24″ auger drill bit from WOBLLMX is designed for wood, including soft and hard variants, MDF, plywood, and even tree stumps. It features a quick-change hex shank and a tri-flute cutting design with centering tips to ensure accurate starting and fast drilling. The tri-flute design aids in chip clearance and reduces friction. Although intended for wood and related materials, its length and hollow core facilitate deeper holes when working with wooden structures or pipe installation channels that require extended reach. It is not recommended for metal drilling.
Notable details: 24-inch total length; 1/4″ diameter; quick-change hex shank; triple-cutters and centering tip for precision; suitable for various wood materials and PVC installations. A longer bit with a specialized geometry helps in fast, clean holes in expansive wooden projects.
Jonard Tools DBF-1424 High Speed Steel Flex Bellhanger Drill Bit
The Jonard DBF-1424 is a high-speed steel bit with a flexible shaft designed for metal and wood, particularly in tight corners and challenging spaces. Its flexible shaft helps navigate cramped installations, and a wire-pulling hole at the bit head and chuck end allows for easier wiring after drilling—useful for telecom, security, and electrical work. The three-flat shank provides anti-slip engagement in the chuck, improving control and accuracy. For metal applications, ensure your drill and cooling strategy align with these long bits to manage heat during extended drilling sessions.
Core attributes: 1/4″ diameter, 24″ length, flexible shaft; wire-pulling capability; anti-slip three-flat shank; optimized for confined spaces and precise long-reach drilling in metal and wood contexts.
NEIKO 10047A Extra Long Drill Bit Set (12″)
The NEIKO 10047A set features 12-inch extra-long drill bits in 1/8, 3/16, 1/4, 5/16, and 3/8 inches. These M2 high-speed steel bits offer improved hardness and wear resistance for general drilling tasks. The longer reach helps with deeper holes and more stability during rapid drilling. While not 24 inches, their length serves as an excellent option when extra extension is required and metal drilling is involved. Use with appropriate coolant and a drill press or low-speed hand drill to maximize life and performance.
Highlights: long reach of 12 inches; M2 HSS; five common sizes; designed for durable general-purpose drilling in metal, wood, and plastics. They strike a balance between reach and versatility for workshop needs.
Drill America 1/4″ x 18″ High Speed Steel Bit
This Drill America DWDDL series bit is an 18-inch high-speed steel tool with a black oxide-treated surface that helps lubricity and retains cutting edge life during extended drilling. The round shank design makes it compatible with a wide range of toolholding systems. While shorter than 24 inches, it provides valuable longer-reach capability for metal and hard plastics where an 18-inch extension is sufficient and practical in many setups.
Important notes: high-speed steel construction; black oxide surface for corrosion resistance and lubrication; round shanks for versatile toolholding. Consider this bit for deep but not full 24-inch reach requirements and common metal drilling tasks.
Drill America 5 Piece High-Speed Steel Extra-Long Set (12″ Long)
This 5-piece set offers lengths up to 12 inches in 1/4, 5/16, 3/8, 7/16, and 1/2 inch diameters. Targeted at general purpose drilling with extended reach, these bits are designed to perform across iron and steel families. While not reaching 24 inches, the POU series bits provide reliable HSS performance for deeper holes in metal and related materials, with a focus on durability and broad material compatibility.
Core points: HSS construction; 12-inch reach; sizes include common mid-range diameters; suitable for general purpose deep drilling in metal and allied materials.
Buying Guide: Long-Reach Drilling Considerations
- Material and alloy: For metal drilling, cobalt or high-speed steel (HSS) alloys offer better hardness and wear resistance. Cobalt alloys resist heat buildup when drilling tough metals, while HSS is versatile for a wide range of metals and plastics.
- Length and reach: Extended-length bits improve accessibility in deep cavities, reinforced studs, or framing where standard bits cannot reach. Match the length to your project; excessively long bits can introduce deflection if the drill is not properly supported.
- Point geometry: Split points or single-point tips influence starting accuracy and drilling speed. A 135-degree split point helps prevent walking, which is valuable in metal and hard composites.
- Shank design: Hex shanks and three-flat shanks aid chuck grip and reduce slippage in cordless or corded drills. Ensure your drill chuck supports the bit’s shank type for best results.
- Chip clearance and flute design: Flute geometry affects debris removal and heat management. Multi-flute designs can improve chip evacuation in longer bits, keeping the cutting edge cooler and more efficient.
- Application suitability: Always verify material compatibility. Some long bits may list wood-specific or auger-focused designs that provide long reach but are not intended for metal. Use within the recommended material scope to maximize lifespan and safety.
- Cooling and lubrication: Extended-use drilling in metal benefits from coolant or lubrication, especially with longer bits where heat can accumulate. Use appropriate methods to reduce wear and prolong bit life.
- Tool compatibility: Confirm your drill, chuck size, and torque capabilities match the bit diameter and length. Longer bits demand steady guidance to prevent deflection and ensure clean holes.
- Maintenance: Clean and inspect bits after use. Rust prevention and storage in a dry environment help maintain cutting performance, particularly for black oxide-coated bits.
- Budget vs. performance: While longer bits may cost more, their value is in extended reach and durability. For critical metalwork, prioritize cobalt/HSS quality and robust construction over lower-cost alternatives.
In summary, the selected 24-inch (and near-24-inch) options emphasize extended reach, stable geometry, and metal-capable alloys. Before purchasing, assess your drill compatibility, material types, and the depth of holes you frequently encounter to select the best long-bit set for your shop.