Best Extra Long Drill Bits Under $100 (2026)
We ranked extra long bits under $100 by length, material (HSS/black-oxide), brand consistency, and an overall value score combining price and utility
The Verdict
- Best Overall: BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3) — Best for short-reach long bits: precise 12-inch option with brand engineering for consistent drift control
- Best Value: 1/2 in x 10 in extra length drill bit (DWDDL series) — mid-length: 10-inch HSS bit that balances reach and rigidity for metal and wood work
This roundup identifies extra long drill bits under $100 that balance reach, material, and value for tradespeople and serious DIYers. Selections prioritize length, high-speed steel construction or branded engineering, and a value score derived from price, length, and user utility
Top Picks
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1
Best Overall BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3)
Best for short-reach long bits: precise 12-inch option with brand engineering for consistent drift control
Aircraft black oxide drill bit with speed helix for faster drilling in light-gauge metal, wood, and plastic. Per-pack info; longer life and reduced heat. One customer notes good quality and length enough to drill through walls
- faster drilling
- longer bit life
- versatile for metal, wood, plastic
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2
Best Value 1/2 in x 10 in extra length drill bit (DWDDL series)
mid-length: 10-inch HSS bit that balances reach and rigidity for metal and wood work
High-speed steel drill bit with extra length for reach and black oxide finish for lubricity. Customers note sharpness and long flute length, with mixed durability feedback
- extra length for reach
- black oxide lubrication
- round shank versatility
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3
27/64" x 18" high speed steel drill bit, extra long DWDDL
Best for deep drilling: 18-inch HSS length suited to long-reach holes through thinner materials
High-speed steel drill bit with extra length for reach. Provides hardness and toughness with lubricity from black oxide coating. Customers note sharpness and long flute length, with mixed durability feedback
- extra-long reach
- black oxide lubricity
- round shank versatility
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4
DWDDL18X1/8 1/8" x 18" High Speed Steel Drill Bit
Best for fine work at extreme reach: 18-inch 1/8" HSS bit for delicate pilot holes and routed paths
High-speed steel drill bit with extra length for reach. Durable with wear resistance and good cutting performance; some users report issues with durability and straightness
- extra long reach for drilling
- black oxide for lubricity
- round shank for broad compatibility
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5
Drill America 15/32" x 18" HSS Extra Long Drill Bit
High-speed steel drill bit with extra reach for general purpose drilling. Features lubricity from black oxide finish and round shank for versatile toolholding; designed for chip evacuation in counterclockwise/right-hand cut operations. Noted for length and quality with mixed durability/sharpness feedback
- extra-long reach
- black oxide lubricity
- round shank versatility
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6
19/64 x 18 in high-speed steel extra long drill bit
Best consistent runout control: 18-inch HSS bit designed for steady long-reach drilling performance
High-speed steel drill bit with extra length for reach. Features black oxide for lubricity and coolant pockets near the edge; round shank for versatile toolholding. Customers note long flute length but mixed durability and sharpness
- extra-long length
- black oxide lubricity
- round shank versatility
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7
5/8" x 18" HSS Extra Long Drill Bit, DWDDL Series
Best for larger holes at length: 5/8" 18-inch HSS bit built to maintain diameter over deep cuts
High-speed steel drill bit with extra length for reach. Helps with general drilling, features black oxide for lubricity and chip evacuation near the edge. Customers note sharpness and quality, with mixed durability and accuracy feedback
- extra-long reach
- sharpness and quality noted
- round shank versatility
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8
Drill America 17/32" x 18" HSS Extra Long Drill Bit
Best for near-maximum rigidity: 17/32" 18-inch HSS bit that balances stiffness with deep-reach capability
High-speed steel drill bit with extra length for reach and wear resistance. Noted for sharpness and quality, though durability and straightness receive mixed feedback
- extra long reach for deep holes
- black oxide treated for lubricity
- round shank for wide mounting compatibility
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9
9/16" x 18" high speed steel extra long drill bit
Best for heavy-duty long holes: 9/16" 18-inch HSS bit offering a stiffer profile for larger through-holes
High-speed steel drill bit with extra reach for general drilling. Combines hardness and toughness with black oxide finish to reduce friction and help coolant retention near the cutting edge. Customers note sharpness and quality, with mixed durability and accuracy insights
- extra long 18" reach
- black oxide surface for lubricity
- sharp, high-speed steel bit
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10
DWDDL12X3/4 3/4" x 12" HSS Extra Long Drill Bit
Best mid-length large-diameter option: 3/4" 12-inch HSS bit for wide holes where some rigidity is needed
High-speed steel drill bit designed for extra reach with good hardness and toughness. Users note quality and sharpness, with mixed durability feedback
- extra-long reach for deep holes
- black oxide coating improves lubrication
- versatile round shank for various toolholders