Best Long Length Drill Bits Under $100 (2026)
We ranked long length drill bits under $100 by value score using length, material (carbide or cobalt), intended application, drill compatibility, and price
The Verdict
- Best Overall: Extension concrete drill bit 39" cross-type carbide for masonry — Best for extra reach: 39" extension with cross-type carbide tip built for masonry penetration on long deep holes
Top Picks
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1
Best Overall Extension concrete drill bit 39" cross-type carbide for masonry
Best for extra reach: 39" extension with cross-type carbide tip built for masonry penetration on long deep holes
Extension drill bit, 39-inch total length with cross-type carbide cutter for concrete, brick, cement walls and stone. Customers note good cutting speed and value, with mixed durability feedback
- 39-inch extension length
- cross-type carbide cutter
- compatible with hammer drills
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2
Extension Concrete Drill Bit 30in with carbide head
Best for hammer drills: 30" extension with carbide head designed for concrete applications and rotary hammer use
Extension concrete drill bit, 30-inch length with cross-type carbide cutter for fast drilling in concrete, brick, cement walls, and stone. Customers note solid build and efficient cutting performance, with some concerns about durability under heavy use
- 30-inch extension for reach
- carbide alloy cutter for efficiency
- double-thread ripple design for speed
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3
Extension Concrete Drill Bit 30in Cross-Type Carbide
Best for debris clearance: 30" cross-type carbide extension engineered to cut masonry while aiding dust evacuation
Extension drill bit with 30-inch total length and cross-type carbide cutter for concrete, brick, cement walls, stone. Noted for faster drilling and durability in hammer drills
- 30-inch extension length
- carbide cross cutter design
- high-strength alloy steel
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4
Extension concrete drill bit 39" cross-type carbide
Best for longest reach: 39" cross-type carbide extension that prioritizes depth for deep concrete drilling tasks
Long extension drill bit for concrete and masonry with a cross-type carbide cutter. Designed for faster drilling in concrete, brick, cement walls, and stone. Users report solid build and good cutting speed, with mixed durability feedback
- 39-inch total length
- Cross-type carbide cutter
- High-strength alloy steel
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5
Milwaukee RED Helix Cobalt Drill Bit Set, 23-PC
Best for mixed materials: 23-piece cobalt set offering durable bits suited for metal and tougher drilling jobs
Durable cobalt drill bit set for metal and wood projects. Includes 23 pieces with RED Helix design for efficient drilling. Customers report high quality with mixed durability feedback
- 23-piece cobalt drill bit set
- RED Helix design
- quality-focused feedback